I’m having the same issue. I host with BlueHost, use Chrome, and use Elegant Theme’s Extra Theme. The issue has only started today and my other websites seem to be fine.
Amy – I love you right now! Thank you SO MUCH! You are a total legend
I’m having this same issue on both my newly installed sites (installed yesterday). It’s not an issue with Theme or plugins as I haven’t added any. Each time I go to search to add a new plugin the error message “No plugins match your request” comes up. So frustrating as I’m filming a tutorial to teach people how to use WordPress. Please HELP!