diff --git a/src/app/(dashboard)/dashboard/cli-tools/components/AntigravityToolCard.tsx b/src/app/(dashboard)/dashboard/cli-tools/components/AntigravityToolCard.tsx
index 153613e4ff..17b9259b01 100644
--- a/src/app/(dashboard)/dashboard/cli-tools/components/AntigravityToolCard.tsx
+++ b/src/app/(dashboard)/dashboard/cli-tools/components/AntigravityToolCard.tsx
@@ -116,7 +116,11 @@ export default function AntigravityToolCard({
         setSudoPassword("");
         fetchStatus();
       } else {
-        setMessage({ type: "error", text: data.error || t("failedStart") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) || t("failedStart"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
@@ -142,7 +146,11 @@ export default function AntigravityToolCard({
         setSudoPassword("");
         fetchStatus();
       } else {
-        setMessage({ type: "error", text: data.error || t("failedStop") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) || t("failedStop"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
@@ -197,7 +205,10 @@ export default function AntigravityToolCard({
 
       if (!res.ok) {
         const data = await res.json();
-        throw new Error(data.error || t("failedSaveMappings"));
+        throw new Error(
+          (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedSaveMappings")
+        );
       }
 
       setMessage({ type: "success", text: t("mappingsSaved") });
diff --git a/src/app/(dashboard)/dashboard/cli-tools/components/ClaudeToolCard.tsx b/src/app/(dashboard)/dashboard/cli-tools/components/ClaudeToolCard.tsx
index 80feaca530..20ae5ad1e3 100644
--- a/src/app/(dashboard)/dashboard/cli-tools/components/ClaudeToolCard.tsx
+++ b/src/app/(dashboard)/dashboard/cli-tools/components/ClaudeToolCard.tsx
@@ -169,7 +169,12 @@ export default function ClaudeToolCard({
           settings: { ...prev?.settings, env },
         }));
       } else {
-        setMessage({ type: "error", text: data.error || t("failedApplySettings") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedApplySettings"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
@@ -191,7 +196,12 @@ export default function ClaudeToolCard({
         );
         setSelectedApiKey("");
       } else {
-        setMessage({ type: "error", text: data.error || t("failedResetSettings") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedResetSettings"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
@@ -257,7 +267,12 @@ export default function ClaudeToolCard({
         checkClaudeStatus();
         fetchBackups();
       } else {
-        setMessage({ type: "error", text: data.error || t("failedRestore") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedRestore"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
diff --git a/src/app/(dashboard)/dashboard/cli-tools/components/ClineToolCard.tsx b/src/app/(dashboard)/dashboard/cli-tools/components/ClineToolCard.tsx
index faf654fab1..8e61118c7c 100644
--- a/src/app/(dashboard)/dashboard/cli-tools/components/ClineToolCard.tsx
+++ b/src/app/(dashboard)/dashboard/cli-tools/components/ClineToolCard.tsx
@@ -118,7 +118,12 @@ export default function ClineToolCard({
         await fetchBackups();
       } else {
         const data = await res.json();
-        setMessage({ type: "error", text: data.error || t("failedRestoreBackup") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedRestoreBackup"),
+        });
       }
     } catch (e) {
       setMessage({ type: "error", text: e.message });
@@ -173,7 +178,10 @@ export default function ClineToolCard({
         await checkClineStatus();
         await fetchBackups();
       } else {
-        setMessage({ type: "error", text: data.error || t("failed") });
+        setMessage({
+          type: "error",
+          text: (typeof data.error === "string" ? data.error : data.error?.message) || t("failed"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
@@ -195,7 +203,10 @@ export default function ClineToolCard({
         await checkClineStatus();
         await fetchBackups();
       } else {
-        setMessage({ type: "error", text: data.error || t("failed") });
+        setMessage({
+          type: "error",
+          text: (typeof data.error === "string" ? data.error : data.error?.message) || t("failed"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
diff --git a/src/app/(dashboard)/dashboard/cli-tools/components/CliproxyapiToolCard.tsx b/src/app/(dashboard)/dashboard/cli-tools/components/CliproxyapiToolCard.tsx
index 62f0e49d14..5a154adcdd 100644
--- a/src/app/(dashboard)/dashboard/cli-tools/components/CliproxyapiToolCard.tsx
+++ b/src/app/(dashboard)/dashboard/cli-tools/components/CliproxyapiToolCard.tsx
@@ -75,7 +75,12 @@ export default function CliproxyapiToolCard({ isExpanded, onToggle }) {
         await fetchStatus();
         if (action === "install" || action === "restart") await fetchUpdateInfo();
       } else {
-        setMessage({ type: "error", text: data.error || `${action} failed` });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            `${action} failed`,
+        });
       }
     } catch (err) {
       setMessage({ type: "error", text: err instanceof Error ? err.message : "Request failed" });
diff --git a/src/app/(dashboard)/dashboard/cli-tools/components/CodexToolCard.tsx b/src/app/(dashboard)/dashboard/cli-tools/components/CodexToolCard.tsx
index 689d18ee8b..2313a7a9a1 100644
--- a/src/app/(dashboard)/dashboard/cli-tools/components/CodexToolCard.tsx
+++ b/src/app/(dashboard)/dashboard/cli-tools/components/CodexToolCard.tsx
@@ -178,7 +178,12 @@ export default function CodexToolCard({
         setMessage({ type: "success", text: t("settingsApplied") });
         checkCodexStatus();
       } else {
-        setMessage({ type: "error", text: data.error || t("failedApplySettings") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedApplySettings"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
@@ -198,7 +203,12 @@ export default function CodexToolCard({
         setSelectedModel("");
         checkCodexStatus();
       } else {
-        setMessage({ type: "error", text: data.error || t("failedResetSettings") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedResetSettings"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
@@ -246,7 +256,12 @@ export default function CodexToolCard({
         setNewProfileName("");
         fetchProfiles();
       } else {
-        setMessage({ type: "error", text: data.error || t("failedSaveProfile") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedSaveProfile"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
@@ -270,7 +285,12 @@ export default function CodexToolCard({
         checkCodexStatus();
         fetchBackups();
       } else {
-        setMessage({ type: "error", text: data.error || t("failedActivateProfile") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedActivateProfile"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
@@ -318,7 +338,12 @@ export default function CodexToolCard({
         checkCodexStatus();
         fetchBackups();
       } else {
-        setMessage({ type: "error", text: data.error || t("failedRestore") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedRestore"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
diff --git a/src/app/(dashboard)/dashboard/cli-tools/components/DefaultToolCard.tsx b/src/app/(dashboard)/dashboard/cli-tools/components/DefaultToolCard.tsx
index 0918862dab..2fa8f408cc 100644
--- a/src/app/(dashboard)/dashboard/cli-tools/components/DefaultToolCard.tsx
+++ b/src/app/(dashboard)/dashboard/cli-tools/components/DefaultToolCard.tsx
@@ -249,7 +249,12 @@ export default function DefaultToolCard({
       if (res.ok) {
         setMessage({ type: "success", text: data.message || t("configurationSaved") });
       } else {
-        setMessage({ type: "error", text: data.error || t("failedToSave") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedToSave"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
diff --git a/src/app/(dashboard)/dashboard/cli-tools/components/DroidToolCard.tsx b/src/app/(dashboard)/dashboard/cli-tools/components/DroidToolCard.tsx
index e8e560d57c..cbdef26635 100644
--- a/src/app/(dashboard)/dashboard/cli-tools/components/DroidToolCard.tsx
+++ b/src/app/(dashboard)/dashboard/cli-tools/components/DroidToolCard.tsx
@@ -150,7 +150,12 @@ export default function DroidToolCard({
         setMessage({ type: "success", text: t("settingsApplied") });
         checkDroidStatus();
       } else {
-        setMessage({ type: "error", text: data.error || t("failedApplySettings") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedApplySettings"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
@@ -171,7 +176,12 @@ export default function DroidToolCard({
         setSelectedApiKeyId("");
         checkDroidStatus();
       } else {
-        setMessage({ type: "error", text: data.error || t("failedResetSettings") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedResetSettings"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
@@ -211,7 +221,12 @@ export default function DroidToolCard({
         checkDroidStatus();
         fetchBackups();
       } else {
-        setMessage({ type: "error", text: data.error || t("failedRestore") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedRestore"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
diff --git a/src/app/(dashboard)/dashboard/cli-tools/components/KiloToolCard.tsx b/src/app/(dashboard)/dashboard/cli-tools/components/KiloToolCard.tsx
index 5572e44da3..52cfd85391 100644
--- a/src/app/(dashboard)/dashboard/cli-tools/components/KiloToolCard.tsx
+++ b/src/app/(dashboard)/dashboard/cli-tools/components/KiloToolCard.tsx
@@ -104,7 +104,12 @@ export default function KiloToolCard({
         await fetchBackups();
       } else {
         const data = await res.json();
-        setMessage({ type: "error", text: data.error || t("failedRestoreBackup") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedRestoreBackup"),
+        });
       }
     } catch (e) {
       setMessage({ type: "error", text: e.message });
@@ -159,7 +164,10 @@ export default function KiloToolCard({
         await checkKiloStatus();
         await fetchBackups();
       } else {
-        setMessage({ type: "error", text: data.error || t("failed") });
+        setMessage({
+          type: "error",
+          text: (typeof data.error === "string" ? data.error : data.error?.message) || t("failed"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
@@ -181,7 +189,10 @@ export default function KiloToolCard({
         await checkKiloStatus();
         await fetchBackups();
       } else {
-        setMessage({ type: "error", text: data.error || t("failed") });
+        setMessage({
+          type: "error",
+          text: (typeof data.error === "string" ? data.error : data.error?.message) || t("failed"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
diff --git a/src/app/(dashboard)/dashboard/cli-tools/components/OpenClawToolCard.tsx b/src/app/(dashboard)/dashboard/cli-tools/components/OpenClawToolCard.tsx
index 84bdd357e7..fd365e9e89 100644
--- a/src/app/(dashboard)/dashboard/cli-tools/components/OpenClawToolCard.tsx
+++ b/src/app/(dashboard)/dashboard/cli-tools/components/OpenClawToolCard.tsx
@@ -152,7 +152,12 @@ export default function OpenClawToolCard({
         setMessage({ type: "success", text: t("settingsApplied") });
         checkOpenclawStatus();
       } else {
-        setMessage({ type: "error", text: data.error || t("failedApplySettings") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedApplySettings"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
@@ -173,7 +178,12 @@ export default function OpenClawToolCard({
         setSelectedApiKeyId("");
         checkOpenclawStatus();
       } else {
-        setMessage({ type: "error", text: data.error || t("failedResetSettings") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedResetSettings"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
@@ -213,7 +223,12 @@ export default function OpenClawToolCard({
         checkOpenclawStatus();
         fetchBackups();
       } else {
-        setMessage({ type: "error", text: data.error || t("failedRestore") });
+        setMessage({
+          type: "error",
+          text:
+            (typeof data.error === "string" ? data.error : data.error?.message) ||
+            t("failedRestore"),
+        });
       }
     } catch (error) {
       setMessage({ type: "error", text: error.message });
diff --git a/src/shared/validation/schemas.ts b/src/shared/validation/schemas.ts
index 9a8921f471..972b7d8abc 100644
--- a/src/shared/validation/schemas.ts
+++ b/src/shared/validation/schemas.ts
@@ -1708,7 +1708,7 @@ export const cliSettingsEnvSchema = z.object({
 
 export const cliModelConfigSchema = z.object({
   baseUrl: z.string().trim().min(1, "baseUrl and model are required"),
-  apiKey: z.string().optional(),
+  apiKey: z.string().nullable().optional(),
   model: z.string().trim().min(1, "baseUrl and model are required"),
   reasoningEffort: z.enum(["none", "low", "medium", "high", "xhigh"]).optional(),
   wireApi: z.enum(["chat", "responses"]).optional(),