Server Error (500) on access /api/v1/tasks while media is encoding

[acrawford73]

Describe the issue
In browser, Server Error (500) is seen while video is transcoding and /api/v1/tasks API is accessed to view running tasks.

To Reproduce
Steps to reproduce the issue:

1. Access /api/vi/tasks. Api responds with no tasks in queue. All good.
2. Upload a video.
3. Access /api/v1/tasks. Server responds with "Server Error (500)"

Expected behavior
Proper '/api/v1/tasks' response with running task details.

Screenshots
If applicable, add screenshots to help explain your problem.

Environment (please complete the following information):

• OS: Ubuntu 22.04 LTS
• Installation method: single server install
• Browser: Brave

Additional context
Debug Log:

Internal Server Error: /api/v1/tasks
Traceback (most recent call last):
File "/home/mediacms.io/lib/python3.10/site-packages/django/core/handlers/exception.py", line 55, in inner
response = get_response(request)
File "/home/mediacms.io/lib/python3.10/site-packages/django/core/handlers/base.py", line 197, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/mediacms.io/lib/python3.10/site-packages/django/views/decorators/csrf.py", line 56, in wrapper_view
return view_func(*args, **kwargs)
File "/home/mediacms.io/lib/python3.10/site-packages/django/views/generic/base.py", line 104, in view
return self.dispatch(request, *args, **kwargs)
File "/home/mediacms.io/lib/python3.10/site-packages/rest_framework/views.py", line 509, in dispatch
response = self.handle_exception(exc)
File "/home/mediacms.io/lib/python3.10/site-packages/rest_framework/views.py", line 469, in handle_exception
self.raise_uncaught_exception(exc)
File "/home/mediacms.io/lib/python3.10/site-packages/rest_framework/views.py", line 480, in raise_uncaught_exception
raise exc
File "/home/mediacms.io/lib/python3.10/site-packages/rest_framework/views.py", line 506, in dispatch
response = handler(request, *args, **kwargs)
File "/home/mediacms.io/mediacms/files/views.py", line 1396, in get
ret = list_tasks()
File "/home/mediacms.io/mediacms/files/methods.py", line 427, in list_tasks
task_args = task_args.replace(bad, "")
AttributeError: 'list' object has no attribute 'replace'