Render Button & Camera Manager For Blender 3+ [QUICK FIX 07/04/2022] - v0.3.9

I get a following error when trying to activate (v. 0.3.6):

Traceback (most recent call last):
  File "C:\programs\b281a\2.81\scripts\modules\addon_utils.py", line 351, in enable
    mod = __import__(module_name)
ModuleNotFoundError: No module named 'render_button_0'