Error when trying to install on ArchLinux

register_class(…): already registered as a subclass ‘ZENUVLIST_OT_entry_remove’

Hi, it seems to be wrongly upgraded using Copy New Settings Blender option while upgrading to the highest version. The possible workaround:

  1. Uninstall addon (Remove)
  2. Restart Blender
  3. Install addon
  4. Restart Blender

No module named ‘imghdr’

ZenUV does not use any module with such name. And provide the full debug log file the next time, please

Python: Traceback (most recent call last):
File “/usr/share/blender/4.4/scripts/addons_core/bl_pkg/bl_extension_ops.py”, line 1499, in execute
cmd_batch = self.exec_command_iter(is_modal)
File “/usr/share/blender/4.4/scripts/addons_core/bl_pkg/bl_extension_ops.py”, line 2589, in exec_command_iter
self.exec_legacy(source_filepath)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
File “/usr/share/blender/4.4/scripts/addons_core/bl_pkg/bl_extension_ops.py”, line 2722, in exec_legacy
bpy.types.PREFERENCES_OT_addon_install.execute(self, bpy.context)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
File “/usr/share/blender/4.4/scripts/startup/bl_operators/userpref.py”, line 813, in execute
bpy.ops.preferences.addon_enable(module=mod.name)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
File “/usr/share/blender/4.4/scripts/modules/bpy/ops.py”, line 109, in call
ret = _op_call(self.idname_py(), kw)
RuntimeError: Error: register_class(…): already registered as a subclass ‘ZENUVLIST_OT_entry_remove’

and if i restart blender and tries to activate it it just say

No module named ‘imghdr’

gonna see if i can generate a log file so you can see the actual debug stuff

My bad, I forgot that Checker system uses imghdr module. So you need to install this module manually using pip, because in Windows, Mac other Linux, it is deployed by default

I see that it is removed from Python 3.13 and seems that in your system Python version is different from other OS

Sorry, started issues because i was lazy and wanted to update blender through my system update so i installed it from repository.
now i installed the tar from the website which provide it’s own python instead of the system python, and then it works without issues.