Hi, we have been running Jenkins fairly successfully with the nginx reverse proxy but the nginx configuration seems to be causing some problems. To investigate, we disabled nginx but are now getting lots of these messages:
## HTTP ERROR 403 No valid crumb was included in the request
And ‘Manage Jenkins’ shows:
It appears that your reverse proxy set up is broken.
We have CSRF Protection > Crumb Issuer set to Default Crumb Issuer.
The setting of CSRF Protection > Crumb > Enable Proxy Compatibility seems to make no difference.
The log shows lots of errors like this:
Jun 08, 2023 1:50:23 PM WARNING hudson.security.csrf.CrumbFilter doFilter
No valid crumb was included in request for /administrativeMonitor/hudson.diagnosis.ReverseProxySetupMonitor/test by admin. Returning 403.
Any suggestions how to fix this please?