Motioneye stopped working "No module named pytz"

No idea what happened, but motioneye add-on suddenly stopped working.
I deinstalled it, reinstalled it and could log in again, then I imported my old config, and it worked some time (minutes to one hour) and now it always shows this:

You are currently running version 0.118.1
Supervisor 2020.12.6
HassOS 5.4

Motioneye 0.10.2

 Add-on: motionEye
 Simple, elegant and feature-rich CCTV/NVR for your cameras
 Add-on version: 0.10.2
 You are running the latest version of this add-on.
 System: HassOS 5.4  (aarch64 / raspberrypi4-64)
 Home Assistant Core: 0.118.1
 Home Assistant Supervisor: 2020.12.6
 Please, share the above information when looking for help
 or support in, e.g., GitHub, forums or the Discord chat.
[cont-init.d] exited 0.
[cont-init.d] executing... 
[cont-init.d] exited 0.
[cont-init.d] executing... 
backing up /data/motioneye/motioneye.conf
[cont-init.d] exited 0.
[cont-init.d] executing... 
[cont-init.d] exited 0.
[cont-init.d] done.
[services.d] starting services
[services.d] done.
[21:01:16] INFO: Starting motionEye...
    INFO: hello! this is motionEye server 0.42.1
    INFO: main config file /data/etc/motion.conf does not exist, using default values
Traceback (most recent call last):
  File "/usr/bin/meyectl", line 11, in <module>
    load_entry_point('motioneye==0.42.1', 'console_scripts', 'meyectl')()
  File "/usr/lib/python2.7/site-packages/motioneye/", line 255, in main
    server.main(arg_parser, sys.argv[2:], command[:-6])
  File "/usr/lib/python2.7/site-packages/motioneye/", line 439, in main
  File "/usr/lib/python2.7/site-packages/motioneye/", line 362, in run
  File "/usr/lib/python2.7/site-packages/motioneye/", line 296, in make_media_folders
    config.get_main()  # just to have main config already loaded
  File "/usr/lib/python2.7/site-packages/motioneye/", line 228, in get_main
  File "/usr/lib/python2.7/site-packages/motioneye/", line 2020, in _get_additional_config
    (sections, configs) = get_additional_structure(camera=bool(camera_id))
  File "/usr/lib/python2.7/site-packages/motioneye/", line 1991, in get_additional_structure
    result = func()
  File "/usr/lib/python2.7/site-packages/motioneye/", line 126, in timeZone
    import pytz
ImportError: No module named pytz