@Nneuland magicmirror is just an application.
other things might be consuming CPU too.

ssh in and run the top command.
it will bring up a green of running processes sorted u CPU usage, high to low

and it refreshes every few seconds.

particularly when the system appears slowed down

@mumblebaj

Thank you.

The solution was a little misunderstanding, but I figured it out, and now it seems to work.

@thebassfly said in After Update to 2.15, MM ist black.:

Cannot find module ‘valid-url’

this library was removed from mm in 2.15 because of security risks.

some module u are using is using it, but did not declare it in their package.json file dependencies section

do

cd MagicMirror
npm install valid-url