Same here, i found the school and class, but not the right id or class that works.
Edit:
What i´m looking for is this school:
https://web.skola24.se/timetable/timetable-viewer/umea.skola24.se/Dragonskolan/

And the Klass:
VF1A

Edit:
Found it!

@sdetweil
Didn´t understand what he meant by “look att the outgiong network”, but then i was fiddling around and found the right id.