Error above is from Firefox. Get a slightly different one in Edge and Chrome:

TypeError
Cannot read properties of null (reading 'querySelector')

TypeError: Cannot read properties of null (reading 'querySelector')
at le (http://192.168.1.10:8096/web/73233.294285d0ae14263ac91a.chunk.js:2:12497)
at 73233 (http://192.168.1.10:8096/web/73233.294285d0ae14263ac91a.chunk.js:2:17829)
at s (http://192.168.1.10:8096/web/runtime.bundle.js?cb9605c13a12ef3dce91:1:155)
at 78304 (http://192.168.1.10:8096/web/users-parentalcontrol.bf742afb5e8cedfcb442.chunk.js:1:2806)
at s (http://192.168.1.10:8096/web/runtime.bundle.js?cb9605c13a12ef3dce91:1:155)
at http://192.168.1.10:8096/web/main.jellyfin.bundle.js?cb9605c13a12ef3dce91:2:446851

If you create a new schedule, exit and then re-open the page, are you able to delete it?

No, same issue, even with newly created schedules. Clicking the delete button doesn't appear to do anything, but then the errors above popup if I try refreshing the page. So, must be doing something, just not the right thing 😊

It looks like you're also mentioning a separate issue where refreshing the profile page will result in the page not loading with an error.

Sorry, yes, you're right. I didn't realise the JS error occurred regardless of anything done on the Parental Control page. I (erroneously) thought they only occurred after trying to delete a schedule.

Would you like me to raise a separate ticket for the JS error?

Sure.