Hello, my XD is up-to-date, and I still can't install plugins
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Sorry to hear about the trouble. Please try the suggestions shared here https://helpx.adobe.com/xd/kb/issues-installing-xd-plugins.html and let us know if this helps or if you need any further assistance.
Hope you're doing well.
We would like to follow up on your plugin issue. Are you able to resolve the issue by trying the steps shared above?
Please feel free to update the discussion if you need further assistance from us.
We would be happy to help.