My website isn’t working since yesterday and after messaging my hosting provider they have told me that due to your plug in the website has gone down .
Because these resources can’t be loaded, your website isn’t loading correctly.
This is what they said
“I’ve had a look at your website, and there’s a lot of 403 error messages when loading resources from “hb.wpmucdn.com”, which appears to be this provider: https://premium.wpmudev.org/cdn/
Do you (or your developer) have an account with that provider (https://premium.wpmudev.org/cdn/)? If so (or you’re not sure), you will need to contact them and find out why you’re getting these errors.”
Hope this issue can be fixed