A user reports a 504 Gateway Timeout error in the dashboard for some reports, accompanied by an error log indicating a process running for over 90 seconds on the default database. The issue persists after trying safe mode and disabling plugins. The user is running Discourse 2.8.0.beta8 and has updated to the latest version without resolving the problem. Another user confirms a similar issue, seeking a solution. hnaseri, osioke, Prasanth_Balan