No Connection on Safari

I’m having trouble with establishing a connection only on Safari, my ChordCrush training works fine on Chrome. Any ideas why this is happening? Using Safari 15.2 on MacOS 10.15.7. I’m unable to get it to work at all on Safari after restart and clearing browser cache. See screenshot attached. Thanks!! Screen Shot 2022-01-11 at 5.32.56 PM|636x499