Couchbase server console - getting 401 response frequently and session is terminated

Hi,

Our Couchbase Server version is Enterprise Edition 6.0.0 build 1693 ‧ IPv4

After successfully logging into the console and executing some queries, suddenly I’m kicked out of the session back to the login page… All requests are returning 401 response …

Why is this happening and what is the fix?

Thanks,
Dony Thomas