Thanks for the reply 
Funnily enough when I now tried to access the web gui to make sure I got fresh error logs it worked fine.
However restarting the container did re-introduce the problem, this is my apache error_log from restart, I did try to access the site twice however this did not seem to generate more errors in here, so I am unsure if these errors are actually relevant to the gateway timeouts.
I did see similiar errors from earlier too, but not necessarily during the times I tried to reconnect, reinforcing the fact that these might not be related. I’m including them because these seem to be the only errors I get.
[Fri Jun 25 09:00:31.734107 2021] [mpm_prefork:notice] [pid 258] AH00169: caught SIGTERM, shutting down
[Fri Jun 25 09:00:39.029274 2021] [mpm_prefork:notice] [pid 238] AH00163: Apache/2.4.38 (Debian) mod_wsgi/4.7.0 Python/3.8 mod_fcgid
/2.3.9 configured -- resuming normal operations
[Fri Jun 25 09:00:39.029328 2021] [core:notice] [pid 238] AH00094: Command line: '/usr/sbin/apache2 -f /omd/sites/cmk/etc/apache/apa
che.conf'
[Fri Jun 25 09:01:02.607260 2021] [wsgi:error] [pid 242] /omd/sites/cmk/lib/python3/cmk/gui/plugins/openapi/restful_objects/params.p
y:199: UserWarning: BIRuleEndpointSchema: field id has no description.
[Fri Jun 25 09:01:02.607286 2021] [wsgi:error] [pid 242] warnings.warn(f"{name}: field {key} has no description.")
[Fri Jun 25 09:01:02.607306 2021] [wsgi:error] [pid 242] /omd/sites/cmk/lib/python3/cmk/gui/plugins/openapi/restful_objects/params.p
y:199: UserWarning: BIRuleEndpointSchema: field nodes has no description.
[Fri Jun 25 09:01:02.607309 2021] [wsgi:error] [pid 242] warnings.warn(f"{name}: field {key} has no description.")
[Fri Jun 25 09:01:02.607322 2021] [wsgi:error] [pid 242] /omd/sites/cmk/lib/python3/cmk/gui/plugins/openapi/restful_objects/params.p
y:199: UserWarning: BIRuleEndpointSchema: field params has no description.
[Fri Jun 25 09:01:02.607325 2021] [wsgi:error] [pid 242] warnings.warn(f"{name}: field {key} has no description.")
[Fri Jun 25 09:01:02.607336 2021] [wsgi:error] [pid 242] /omd/sites/cmk/lib/python3/cmk/gui/plugins/openapi/restful_objects/params.p
y:199: UserWarning: BIRuleEndpointSchema: field node_visualization has no description.
[Fri Jun 25 09:01:02.607339 2021] [wsgi:error] [pid 242] warnings.warn(f"{name}: field {key} has no description.")
[Fri Jun 25 09:01:02.607358 2021] [wsgi:error] [pid 242] /omd/sites/cmk/lib/python3/cmk/gui/plugins/openapi/restful_objects/params.p
y:199: UserWarning: BIRuleEndpointSchema: field properties has no description.
[Fri Jun 25 09:01:02.607361 2021] [wsgi:error] [pid 242] warnings.warn(f"{name}: field {key} has no description.")
[Fri Jun 25 09:01:02.607372 2021] [wsgi:error] [pid 242] /omd/sites/cmk/lib/python3/cmk/gui/plugins/openapi/restful_objects/params.p
y:199: UserWarning: BIRuleEndpointSchema: field aggregation_function has no description.
[Fri Jun 25 09:01:02.607374 2021] [wsgi:error] [pid 242] warnings.warn(f"{name}: field {key} has no description.")
[Fri Jun 25 09:01:02.607384 2021] [wsgi:error] [pid 242] /omd/sites/cmk/lib/python3/cmk/gui/plugins/openapi/restful_objects/params.p
y:199: UserWarning: BIRuleEndpointSchema: field computation_options has no description.
[Fri Jun 25 09:01:02.607387 2021] [wsgi:error] [pid 242] warnings.warn(f"{name}: field {key} has no description.")
[Fri Jun 25 09:01:02.607397 2021] [wsgi:error] [pid 242] /omd/sites/cmk/lib/python3/cmk/gui/plugins/openapi/restful_objects/params.p
y:199: UserWarning: BIRuleEndpointSchema: field pack_id has no description.
[Fri Jun 25 09:01:02.607400 2021] [wsgi:error] [pid 242] warnings.warn(f"{name}: field {key} has no description.")
[Fri Jun 25 09:01:02.609519 2021] [wsgi:error] [pid 242] /omd/sites/cmk/lib/python3/cmk/gui/plugins/openapi/restful_objects/params.p
y:199: UserWarning: BIAggregationEndpointSchema: field id has no description.
[Fri Jun 25 09:01:02.609526 2021] [wsgi:error] [pid 242] warning
If there’s another place I should check for logs please do let me know, these are from _data/cmk/var/log/apache/error_log in the volume that gets mounted into /omd/sites on the container.This text will be hidden