I'm using 4.8 but I'm unable to use version 5.x on both my NVIDIA rigs or AMD rig.
It tells me
No miners!
What am I doing wrong in the config file?

Also, I'm using start.bat with MPH pool only and automatic coin and when I come back later my AMD rig is not mining anymore and is stuck in a loop trying to connect on NICEHASH pool but fails. Why is that happening? Can I delete nicehash.ps1 and it will resolve this?