Just in time for the NHL season to start and now the Fox Sports Go app won't work. I searched online and only found information for the January 2020 Roku/Fox issues, but nothing recent. What happened???
Just tried it here on my Streaming Stick+ and Fox Sports Go worked without problems.
When problems are confined to a particular channel, it may be that the channel installation has gotten corrupted. A reinstall may fix the problem, so give it a try.
Remove/reinstall procedure: