One of the test space in our Confluence instance got corrupted - the access was not possible to any of the Space-related links - Layouts, Permissions, etc. The browser would simply display the error page with UnexpectedRollbackException stacktraces.

I couldn't even change the permissions for space access - being a test one it was open for the public (including Google's bot)

Trying to resolve the problem I've tried re-export/import, accessing it from various URLs trying to get to specific page directly... Nothing helped.

Then I found this: CSP-17623 - Corrupted Space Layout caused "UnexpectedRollbackException"

Resetting layout solved the problem!

The magic URL:

<yourDomainURL>/spaces/resetdecorator.action?decoratorName=decorators/space.vmd
&key=<spaceKEY>