Here @Grum999 describes how you could repair the plugin yourself.
But if you don’t like fiddling around in code, you can get the fixed version out of my cloud:
Alternative download location:
You install plugins in Krita by clicking on “Tools” >> “Scripts” >> “Import Plugin from File” and in the dialog that opens, select the file you just downloaded, confirm the selection, then confirm Krita’s message that the plugin is installed and restart Krita. Then you have to search in Krita under ‘‘Settings’’ >> ‘‘Configure Krita’’ >> ‘‘Python Plugin Manager’’ for the plugin you just installed and activate it by checking the box in front of it. Then confirm with “OK” and restart Krita to be able to use the plugin.
Michelist
Add/Edit: Added an alternative download location.