Hi - sorry for the late reply, I was on vacation.

I can see the following errors in the log files:

2024-07-12 11:06:18,964 1 ERROR vbc odoo.http: Exception during request handling. 
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 2189, in __call__
    response = request._serve_db()
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1764, in _serve_db
    return service_model.retrying(self._serve_ir_http, self.env)
  File "/usr/lib/python3/dist-packages/odoo/service/model.py", line 133, in retrying
    result = func()
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1791, in _serve_ir_http
    response = self.dispatcher.dispatch(rule.endpoint, args)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 1908, in dispatch
    return self.request.registry['ir.http']._dispatch(endpoint)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_http.py", line 222, in _dispatch
    result = endpoint(**request.params)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 741, in route_wrapper
    result = endpoint(self, *args, **params_ok)
  File "/usr/lib/python3/dist-packages/odoo/addons/bus/controllers/websocket.py", line 63, in get_websocket_worker_bundle
    stream = request.env['ir.binary']._get_stream_from(bundle.js())
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_binary.py", line 129, in _get_stream_from
    stream = self._record_to_stream(record, field_name)
  File "/usr/lib/python3/dist-packages/odoo/addons/base/models/ir_binary.py", line 73, in _record_to_stream
    return Stream.from_attachment(record)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 508, in from_attachment
    stat = os.stat(self.path)

Hi,
Can you see if there is some information's in odoo log or in the browser console . Also if there is any custom codes/modules is used, ensure, it is still available in the addons path

Thanks