Add on installation failed

Report ID:164395544.
When I was trying to install plugins, it said "add on installation failed The add-on "%S" could not be installed. It may be incompatible with this version of Zotero."
  • Invalid XPI: Error: Extension is invalid
  • That specific error message is almost always the result of downloading the add-on incorrectly. Otherwise you would at least get the title. How are you downloading? Which add-on
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