`get_user_related_models` presenter does not resolve

[bastianjoel]

Describe the bug
get_user_related_models presenter does not resolve

How To Reproduce
Send request

Payload from client (handle_request)
https://localhost:8000/system/presenter/handle_request
[{"presenter":"get_user_related_models","data":{"user_ids":[4]}}]

Response from backend
Does not resolve

Expected behavior
Should respond with data

Additional context
backendPresenter logs:

backendPresenter-1  | enter entrypoint.sh
backendPresenter-1  | Openslides DBMS:
backendPresenter-1  | Export env variables for database.
backendPresenter-1  | postgres:5432 - accepting connections
backendPresenter-1  | DBMS is started.
backendPresenter-1  | Creating schema ...
backendPresenter-1  | /usr/local/lib/python3.12/site-packages/requests/__init__.py:113: RequestsDependencyWarning: urllib3 (2.6.3) or chardet (6.0.0.post1)/charset_normalizer (3.4.4) doesn't match a supported version!
backendPresenter-1  |   warnings.warn(
backendPresenter-1  | Assuming relational schema is applied, because table version exists.
backendPresenter-1  | 
backendPresenter-1  | 
backendPresenter-1  | /usr/local/lib/python3.12/site-packages/requests/__init__.py:113: RequestsDependencyWarning: urllib3 (2.6.3) or chardet (6.0.0.post1)/charset_normalizer (3.4.4) doesn't match a supported version!
backendPresenter-1  |   warnings.warn(
backendPresenter-1  | [2026-02-25 11:54:37 +0000] [1] [INFO] Starting gunicorn 25.1.0
backendPresenter-1  | [2026-02-25 11:54:37 +0000] [1] [INFO] Listening at: http://0.0.0.0:9003 (1)
backendPresenter-1  | [2026-02-25 11:54:37 +0000] [1] [INFO] Using worker: gthread
backendPresenter-1  | [2026-02-25 11:54:37 +0000] [1] [ERROR] Control server error: [Errno 13] Permission denied
backendPresenter-1  | [2026-02-25 11:54:37 +0000] [16] [INFO] Booting worker with pid: 16
backendPresenter-1  | INFO:sqlfluff.lexer:Rust extensions are not available. Using PyLexer.

[luisa-beerboom]

This is a very normal payload for this presenter. Every single test that isn't supposed to fail has that kind of payload. They all successfully terminate in current main.
I looked at the client issue and let it inspire me to write a test for a newly created account (i.e. a user with no related models whatsoever) and that also worked.

It would be appreciated if more context was given as to which kind of user is using it on which kind of user.

I will continue to look through the code and see if I can find anything that may cause this. I am not confident there will be anything.
Do you have problems with other presenters as well, or is it just this one? Or could there be a problem with the complete instance setup?

[luisa-beerboom]

I've looked at the code for 2 hours now, without finding anything that might cause this presenter not to terminate. @bastianjoel please check your setup again or give more info.

[bastianjoel]

Still happening although it seems like this is not reliably reproducible.

This is not a problem with my setup. The issue also happens in the integration test CI.
https://github.com/OpenSlides/openslides-client/actions/runs/22395953325/job/64878468445

All infos you need can be found in the integration test.

I did not verify that this is the only presenter this is happening to.

[bastianjoel]

The get_user_related_models presenter is not the only one affected. Indeed it seems like none of the presenters work in case the application is in that error state.
I added logs of backendPresenter to the issue description.