Did some reporting and blocking too, wonder if this is helpfull?

Its not that hard electros. Mykle isn’t the youngest either

Make 1 small target at a time. Eg

1 run an existing module eg bustimes
2 change the nodehelper to read your datasource
3 decide on the dataformat to feed into the getdom
4 format the dataformat

@electros you could look at mmm-bustimes. It is a similar module and also parses a json file (a different one) into a table
Git link. https://github.com/73cirdan/MMM-bustimes

Sometimes you can fix/set overscan in the menu of the monitor, may be this helps?

There is a pull request in the github that adresses this

https://github.com/StefanNienhuis/MMM-Buienradar/pull/1

What is the name of the module that has stopped working?

Probably you need to install npm first. Search the forum. There are more posts about this error

@sdetweil not too fond of jquery too. Had to add labels in a creative way. But looks like you are on your way to a chartjs implementation. No experience with that. I would like to see the result though. Perhaps I can rewrite mmm-rainfc. Also when you get stuck, a svg solution is also an possibility…user spotyourdeal did a rewrite of the sparkline into svg for mmm-rainfc

Mmm rainfc uses jquery sparkline.

Mmm-rainfc at git

Did a full reinstall last week. Last version os contains node, but misses npm. After installing npm the mm install script worked. I had to delete the MagicMirror directory which was kept from the first failed install