Unable to install or update plugins

Since my DNS is pointed to Cloudflare, my host says they cannot resolve a problem I am having trying to install any new plugins or update to existing plugins. When attempting to install either a new plugin or an update, I get a fail message that says: " Installing plugin from uploaded file: festingervault.zip Unpacking the package… There has been a critical error on this website. Please check your site admin email inbox for instructions. Learn more about troubleshooting WordPress." Can someone help with this?

Check Firewall Events to identify which Cloudflare security service, if any, is blocking your requests for the upload plugin page. There have been a few posts related to this issue, their solution may help you.


Will read the link you posted cbrandt. Thanks!

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