looks like an issue with sportsnet.ca. Looking at the json file, it was documented well that this provider is used for the majority of scores.
https://github.com/jclarke0000/MMM-MyScoreboard/blob/master/providers/SNET.js
It grabs the scores from this feed.
http://www.sportsnet.ca/wp-content/uploads/scoreboard.json
The feed is still active, so need to do some digging as to what broke it.