diff --git a/packages/@best/agent-hub/src/hub.ts b/packages/@best/agent-hub/src/hub.ts
index ca90e7cd..27be7643 100644
--- a/packages/@best/agent-hub/src/hub.ts
+++ b/packages/@best/agent-hub/src/hub.ts
@@ -232,7 +232,7 @@ export class Hub extends EventEmitter {
                     await remoteAgent.runBenchmarks(remoteClient);
                 } catch (err) {
                     console.log(`[HUB] Error running benchmark for remote client ${remoteClient.getId()}`);
-                    remoteClient.disconnectClient(`Error running benchmark ${err}`); // make sure we disconnect the agent
+                    remoteClient.disconnectClient(`Error running benchmark: ${(err as Error).message}`); // make sure we disconnect the agent
                 } finally {
                     this.activeClients.delete(remoteClient);
                     queueMicrotask(() => this.runQueuedBenchmarks());
diff --git a/packages/@best/agent/src/agent.ts b/packages/@best/agent/src/agent.ts
index 9bd02247..9bc0f76f 100644
--- a/packages/@best/agent/src/agent.ts
+++ b/packages/@best/agent/src/agent.ts
@@ -121,7 +121,7 @@ export class Agent extends EventEmitter {
             } catch (err) {
                 console.log(`[AGENT] Error running benchmark for remote client ${remoteClient.getId()}`);
                 console.log(err);
-                remoteClient.disconnectClient(`Error running benchmark ${err}`); // make sure we disconnect the agent
+                remoteClient.disconnectClient(`Error running benchmark: ${(err as Error).message}`); // make sure we disconnect the agent
             } finally {
                 this.state = AgentState.IDLE;
                 this.interruption = undefined;
diff --git a/packages/@best/agent/src/remote-client.ts b/packages/@best/agent/src/remote-client.ts
index a378bfd8..be3f1def 100644
--- a/packages/@best/agent/src/remote-client.ts
+++ b/packages/@best/agent/src/remote-client.ts
@@ -120,7 +120,7 @@ export default class RemoteClient extends EventEmitter implements RunnerStream {
             // Notify upload updates
             this.emit(BEST_RPC.REMOTE_CLIENT_UPLOAD_COMPLETED);
         } catch (err) {
-            this.disconnectClient(err as any);
+            this.disconnectClient((err as Error).message);
             this._requestJobError(err);
         } finally {
             this.state = RemoteClientState.IDLE;
diff --git a/packages/@best/runner-remote/src/runner-remote.ts b/packages/@best/runner-remote/src/runner-remote.ts
index 6a15ab7d..f685dca7 100644
--- a/packages/@best/runner-remote/src/runner-remote.ts
+++ b/packages/@best/runner-remote/src/runner-remote.ts
@@ -146,7 +146,7 @@ export class RunnerRemote {
                 const uploader = await this._getUploaderInstance();
                 uploader.upload(tarBundle);
             } catch (err) {
-                return this._triggerBenchmarkError(err);
+                return this._triggerBenchmarkError((err as Error).message);
             }
         });
     }