Internal Server Error after nextcloud docker running please help

Nextcloud version: 24.0.4
Operating system and version _: unraid 6.10.3
database system :postgresql14

The issue you are facing:

'Internal Server Error

The server encountered an internal error and was unable to complete your request.
Please contact the server administrator if this error reappears multiple times, please include the technical details below in your report.
More details can be found in the server log.'

Is this the first time you’ve seen this error? : NO

i have got this error many times.
i alway reboot the unraid system,sometimes it work.But now I’m trying to figure out what the problem is.

/mnt/user/appdata/nextcloud/log/php/error.log:

[07-Aug-2022 02:00:01] NOTICE: fpm is running, pid 733
[07-Aug-2022 02:00:01] NOTICE: ready to handle connections
[08-Aug-2022 16:34:53] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[08-Aug-2022 16:38:42] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[08-Aug-2022 18:11:22] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[08-Aug-2022 18:14:53] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[08-Aug-2022 18:20:35] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[08-Aug-2022 18:22:21] WARNING: [pool www] server reached pm.max_children setting (5), consider raising it
[13-Aug-2022 17:39:16] NOTICE: Terminating ...
[13-Aug-2022 17:39:16] NOTICE: exiting, bye-bye!
[13-Aug-2022 22:48:52] NOTICE: fpm is running, pid 213
[13-Aug-2022 22:48:52] NOTICE: ready to handle connections
[13-Aug-2022 23:13:47] NOTICE: Terminating ...
[13-Aug-2022 23:13:47] NOTICE: exiting, bye-bye!
[13-Aug-2022 23:30:10] NOTICE: fpm is running, pid 203
[13-Aug-2022 23:30:10] NOTICE: ready to handle connections
[13-Aug-2022 23:31:37] NOTICE: Terminating ...
[13-Aug-2022 23:31:37] NOTICE: exiting, bye-bye!
[13-Aug-2022 23:36:12] NOTICE: fpm is running, pid 202
[13-Aug-2022 23:36:12] NOTICE: ready to handle connections
[14-Aug-2022 00:50:54] NOTICE: Terminating ...
[14-Aug-2022 00:50:54] NOTICE: exiting, bye-bye!
[14-Aug-2022 00:51:14] NOTICE: fpm is running, pid 202
[14-Aug-2022 00:51:14] NOTICE: ready to handle connections

/mnt/user/appdata/nextcloud/log/nginx/error.log shows nothing,the log is empty.
please help me
thanks all

try searching for this error you find valuable discussions here: