[Safe Kids- can I block my kid's access to certain apps during online school time?]

The solution to work around this problem was to set up two Windows accounts. The work one had games etc all blocked and few time restrictions. The play account allowed much more, but the time when it could be used was controlled. 

Not ideal, but the best compromise that didn't involve constant adjustments. 

[Safe Kids stopped working for me too!]

I'm having a similar problem. Application usage is no longer being reported and apps that are supposed to be blocked are not being blocked. Time limits do appear to be working though.