Merge pull request #4313 from weseek/imprv/7377-get-error-res-from-proxy

imprv: Send error name instead of error type

packages/slackbot-proxy/src/controllers/growi-to-slack.ts

@@ -296,7 +296,7 @@ export class GrowiToSlackCtrl {
       logger.error(err);
 
       if (err.code === ErrorCode.PlatformError) {
-        return res.simulateWebAPIPlatformError(err.message, err.code);
+        return res.simulateWebAPIPlatformError(err.message, err.data.error);
       }
 
       return res.simulateWebAPIRequestError(err.message, err.response?.status);