DSpace 9.2 - Strange Error When Accessing Some Links or Refreshing Some Pages

[Aroldo Rique Júnior]

Hello everyone.

We have just migrated our repository to version 9.2. The link is: https://biblioteca.mpf.mp.br/repositorio

There is a strange error when accessing some pages directly through the link, for example:
https://biblioteca.mpf.mp.br/repositorio/community-list

If I access the repository's homepage and click on the Communities and Collections link:

The page opens correctly:

But if I press F5 or reload the page, the error occurs again:

We are using the default DSpace theme on our frontend, only changing some pages to fit our layout.

Does anyone have any idea what the cause of this error is?

Aroldo

[Aroldo Rique Júnior]

I've already looked for some reference to this sandbox in my frontend before generating the distribution file, and I can't find it...

[DSpace Technical Support]

Hi Aroldo,

I'd recommend following our Troubleshooting Guide to look for underlying errors when you see those error pages.   It looks like you began that process (based on your screenshots as you discovered a hidden 403 Forbidden error in the UI).  But, I'd also recommend looking at the backend logs to see if there's an error occurring at that level.

Generally speaking a 403 error means that you are being told you don't have permissions to access that endpoint.  In this case, it's very strange that the REST API is returning a 403 on the root endpoint (`/server/api`).  It could be that checking the logs of DSpace may provide more clues.  But, I'd also recommend checking the logs of Tomcat (if you have it installed separately) and your proxy server (often Apache or Nginx)... it's also possible that something is occurring at the level of the web server or proxy that is blocking your access to the REST API.

Overall, to me, at a glance, I'm not sure that this is a bug in DSpace. It's almost like something is occasionally blocking communication between the UI and the REST API.  But, I'm not sure what that could be, which is why I'd encourage you to look for more errors in your logs.

Hopefully if someone else has seen this before they will provide additional advice on this mailing list.

Tim

[Andrew K]

Hi,

I would triple check all config files for correct urls (incl. dspace.server.ssr.url), compare to your previous configs.

Also apache settings and security policy

вівторок, 3 лютого 2026 р. о 21:20:24 UTC+2 Aroldo Rique Júnior пише: