I cannot have NextCloud Client fixed or removed on my Windows 11 PC.
Its always referring to the file “D:/Nextcloud/audio/qtaudio_wasapi.dll” that it cannot access and any attempt to uninstall or repair NextCloud via the Windows Apps is not successfull and aborted.
What can I do?
First - stay away from windows 
When I did use windows and there was such a problem it was usually fixable by editing the registry (back it up first), there is usually a few entries. If it was uninstalled/updating and the system shut down it may have been corrupted.
Do you still have a D: drive