ModuleNotFoundError: No module named 'seaserv' in Server development

i am following instructions from here: Server development - Seafile Admin Manual
with ubuntu24.04,
libevhtp tag-1.2.0,
libsearpc tag-v3.3-latest,
seafile-server tag-v11.0.12-server,
seaevents tag-v11.0.12-server,
seafobj tag-v11.0.12-server,
seahub tag-v11.0.12-server
and I get an error when running python3 manage.py migrate


i changed python3.12 to python3.10 but still facing the same error

Why do you try to build your own server? Is there any specific reason why you can’t use the official build container?

I was asked by my boss to learn and be able to edit seafile (at least seahub but with GitHub - haiwen/seahub: The web end of seafile server. I also got the same error). Is there any solution so I can customize the interface to my liking?