New problems with RSS Feed

[gisxkddf]

When trying to send an address Feed

https://art.x10.mx/feed/

RSS Validator This service tests the validity of an RSS 2.0 feed​

This feed does not validate.

• Server returned HTTP Error 500: Internal Server Error [help]

Although Feed is correct

 

[mrburnsx]

Your domain is currently completely unreachable, error 500 on the entire site. This is likely a problem with the plugin you are using.

 

[gisxkddf]

Domains are visible, but when checking https://art.x10.mx/?feed=rss2
On the server https://validator.w3.org/feed/check.cgi?url=https://art.x10.mx/?feed=rss2
Code 500

 

[mrburnsx]

I get error 500 on your entire site, even just https://art.x10.mx. It is likely an issue with the RSS Plugin you are using.

 

[gisxkddf]

Strange. It opens fine for me. There are no RSS plugins
Only RSS check doesn't work

Feed Validator Results: https://art.x10.mx/?feed=rss2