Personally I wouldn’t run Rapid Photo Downloader on Fedora 33 for now, because of these threading errors:
Exception ignored in: <function _after_fork at 0x7f3db2f53040>
Traceback (most recent call last):
File "/usr/lib64/python3.9/threading.py", line 1486, in _after_fork
thread._reset_internal_locks(True)
File "/usr/lib64/python3.9/threading.py", line 829, in _reset_internal_locks
self._tstate_lock._at_fork_reinit()
AttributeError: 'NoneType' object has no attribute '_at_fork_reinit'
This is the first time I’ve seen a problem manifest like this in a core Python system library. It’s not good.