[Update Notice] API: Failed to check for RUST updates, if this keeps happening please contact the developer. Error Code: 521 | Message: error code: 521

Same here, again... 

[Update Notice] API: Failed to check for RUST updates, if this keeps happening please contact the developer. Error Code: 521 | Message: error code: 521

I believe that the API server is down. Using the link on the plugin page seems to indicate this.

Server sponsored by YaMang -w- : Click here to see if the plugin's server is alive

Merged post

It's now back online, fingers crossed it stays up. 🤞