Bug Solving in Staging Deployment

ReactJS + NodeJS Quiz app. Project was working but suddenly there was a bug in newly pushed code in NodeJS. We have 2 separate dashboard- Admin and User. There might be issue in admin side. Using Redis for user session management. Might be related to it.
Error related to - ioredis package
Image attached.
Need to solve it ASAP. May be freelancer can connect in our Developer's System via Anydesk and solve this minor bug.