# I can't start timed exam

**URL:** <https://discuss.openedx.org/t/i-cant-start-timed-exam/17273>\
**Category:** Development\
**Tags:** how-to, tutor, teak\
**Created:** [September 30, 2025, 9:37am UTC](https://discuss.openedx.org/t/i-cant-start-timed-exam/17273 "2025-09-30T09:37:13Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![abylaikhan.suev.02](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.openedx.org/abylaikhan.suev.02/32/7694_2.png) [@abylaikhan.suev.02](https://discuss.openedx.org/u/abylaikhan.suev.02)\
**Post date:** [September 30, 2025, 9:37am UTC](https://discuss.openedx.org/t/i-cant-start-timed-exam/17273/1 "2025-09-30T09:37:13Z")

</div>

![image](https://us1.discourse-cdn.com/flex020/uploads/openedx/original/2X/e/e24f9c239f85e3b01130e4502bbc5a5a1ea31b85.png)  
why i cannot start timed exam? How can i solve?

lms-1 | response = get\_response(request)  
lms-1 | ^^^^^^^^^^^^^^^^^^^^^  
lms-1 | File “/openedx/venv/lib/python3.11/site-packages/django/core/handlers/base.py”, line 197, in  
lms-1 | response = wrapped\_callback(request, \*callback\_args, \*\*callback\_kwargs)  
lms-1 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
lms-1 | File “/opt/pyenv/versions/3.11.8/lib/python3.11/contextlib.py”, line 81, in inner  
lms-1 | return func(\*args, \*\*kwds)  
lms-1 | ^^^^^^^^^^^^^^^^^^^  
lms-1 | File “/openedx/venv/lib/python3.11/site-packages/django/views/decorators/csrf.py”, line 56,  
lms-1 | return view\_func(\*args, \*\*kwargs)  
lms-1 | ^^^^^^^^^^^^^^^^^^^^^^^^^^  
lms-1 | File “/openedx/venv/lib/python3.11/site-packages/django/views/generic/base.py”, line 104, in  
lms-1 | return self.dispatch(request, \*args, \*\*kwargs)  
lms-1 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
lms-1 | File “/openedx/venv/lib/python3.11/site-packages/rest\_framework/views.py”, line 509, in disp  
lms-1 | response = self.handle\_exception(exc)  
lms-1 | ^^^^^^^^^^^^^^^^^^^^^^^^^^  
lms-1 | File “/openedx/venv/lib/python3.11/site-packages/edx\_proctoring/views.py”, line 196, in hand  
lms-1 | resp = super().handle\_exception(exc)  
lms-1 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
lms-1 | File “/openedx/venv/lib/python3.11/site-packages/rest\_framework/views.py”, line 469, in hand  
lms-1 | self.raise\_uncaught\_exception(exc)  
lms-1 | File “/openedx/venv/lib/python3.11/site-packages/rest\_framework/views.py”, line 480, in rais  
lms-1 | raise exc  
lms-1 | File “/openedx/venv/lib/python3.11/site-packages/rest\_framework/views.py”, line 506, in disp  
lms-1 | response = handler(request, \*args, \*\*kwargs)  
lms-1 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
lms-1 | File “/openedx/venv/lib/python3.11/site-packages/edx\_proctoring/views.py”, line 1538, in pos  
lms-1 | start\_exam\_attempt(exam\_id, user\_id)  
lms-1 | File “/openedx/venv/lib/python3.11/site-packages/edx\_proctoring/api.py”, line 1190, in start  
lms-1 | return \_start\_exam\_attempt(existing\_attempt)  
lms-1 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
lms-1 | File “/openedx/venv/lib/python3.11/site-packages/edx\_proctoring/api.py”, line 1226, in \_star  
lms-1 | update\_attempt\_status(  
lms-1 | File “/openedx/venv/lib/python3.11/site-packages/edx\_proctoring/api.py”, line 1648, in updat  
lms-1 | credit\_state = credit\_service.get\_credit\_state(  
lms-1 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
lms-1 | AttributeError: ‘NoneType’ object has no attribute ‘get\_credit\_state’  
lms-1 | [pid: 26|app: 0|req: 830/1995] 172.18.0.3 () {68 vars in 2655 bytes} [Tue Sep 30 09:23:15 2025witches on core 0)