[bug] 500 Internal Server Error

[mdiamandis11]

500 Internal Server Error
The server encountered an internal error and was unable to complete your request. There is an error in the application.
Traceback (most recent call last):
File "/lsiopy/lib/python3.10/site-packages/flask/app.py", line 1511, in wsgi_app
response = self.full_dispatch_request()
File "/lsiopy/lib/python3.10/site-packages/flask/app.py", line 919, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/lsiopy/lib/python3.10/site-packages/flask/app.py", line 917, in full_dispatch_request
rv = self.dispatch_request()
File "/lsiopy/lib/python3.10/site-packages/flask/app.py", line 902, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args) # type: ignore[no-any-return]
File "/app/calibre-web-automated/cps/usermanagement.py", line 86, in decorated_view
return login_required(func)(*args, **kwargs)
File "/app/calibre-web-automated/cps/cw_login/utils.py", line 302, in decorated_view
return current_app.ensure_sync(func)(*args, **kwargs)
File "/app/calibre-web-automated/cps/web.py", line 852, in index
return render_books_list("newest", sort_param, 1, page)
File "/app/calibre-web-automated/cps/web.py", line 439, in render_books_list
entries, random, pagination = calibre_db.fill_indexpage(page, 0, db.Books, True, order[0],
File "/app/calibre-web-automated/cps/db.py", line 813, in fill_indexpage
return self.fill_indexpage_with_archived_books(page, database, pagesize, db_filter, order, False,
File "/app/calibre-web-automated/cps/db.py", line 827, in fill_indexpage_with_archived_books
query = self.generate_linked_query(config_read_column, database)
File "/app/calibre-web-automated/cps/db.py", line 774, in generate_linked_query
query = (self.session.query(database, ub.ArchivedBook.is_archived, ub.ReadBook.read_status)
AttributeError: 'NoneType' object has no attribute 'query'

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4. See error

Expected behavior
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Configuration(please complete the following information):

• OS: [e.g. Ubuntu Server, Debian, UnRaid ect.]
• Hardware: [x86 server, Synology NAS, ARM VPS ect.]
• Version [e.g. 22]

Additional context
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