I've received this error under these circumstances:
- Nexus OSS 3.11.0-01
- anonymous access disabled
- used browser to access: https://nexus/service/rest/repository/browse/maven-group/
- result: ERROR: (ID e58724ee-f009-47f8-9c17-2be6ee10e8e7) java.lang.NullPointerException
- if I log in to Nexus, the browsing succeeds
I am happy an anonymous user cannot browse the repository (as intended), but they should probably just get an Unauthorized message rather than a NullPointerException.