Solved by Pat, here is the solution if someone comes across the same problem:
“It looks like the site has the AddToAny plugin’s stylesheet disabled. Make sure it’s enabled in Settings > AddToAny > Advanced Options > “Use default CSS”.
If that option is actually enabled, you’ll want to troubleshoot your site by deactivating others plugins to find what’s preventing stylesheets from loading.
Cheers,
Pat
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