Cannot connect

This is happening on multiple websites on 2 different servers in the HiVelocity Dallas, TX data center. it’s been happening for about 3 days now.

[15-Jan-2022 02:50:22 UTC] PHP Warning: file_get_contents(https://par2.static.resmush.it/7d5e52fc3d21f5d4242417a2799da44e/11b6a8db731c9c663faeae9138a3d917-300×300.jpeg): failed to open stream: HTTP request failed! HTTP/1.0 503 Service Unavailable
in /home/xephtoken/public_html/wp-content/plugins/resmushit-image-optimizer/classes/resmushit.class.php on line 92

The page I need help with: [log in to see the link]