We recently upgraded to Jira 9.0.0 Server from 8.22.0.
When we try to access the installed Structre PlugIn (tried top bar, project administration and App Configuration), we get:
HTTP Status 405 – Method Not Allowed
Type Status Report
Beschreibung The method received in the request-line is known by the origin server but not supported by the target resource.
Any ideas, whats wrong?