Same problem here — would periodically have to reinstall the image, too. Looking at PiCore Player now, but would prefer to keep using M2P as I paid for it and am familiar with it.
I’m on Version 2.53 on Raspberry PI 4B 4GB. I’ve tried both wired and unwired connections.
It’s been so long since I’ve written to the SD card in the Pi that I’ve forgotten the specific steps used to setup. The crux is that every tab in the web app will open minus the two I mentioned. The player works fine. Don’t really want to have to rewrite to the card if possible, so wondering if this is a typical problem with an easy fix.