Fatal error in exception handler

I have three sites, and the # 1751255215  is always different as I reset the browser page and different for each site,
I Get this  " Fatal error in exception handler. Check log for Exception at time 1751255215 "

The error file at the server said:
[Mon Jun 30 03:46:55 2025] [error] mod_fcgid: stderr: [2025-06-30T03:46:55+00:00] ELGG.ERROR: Exception at time 1751255215:
What could be?

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