Command line – XAMPP files are not executed and do not start

Hello, I recently had a problem with my Mac OS and half of my files had backed up my files and applications. My Mac has now been updated to MacOs Mojave. when I opened my xampp and started executing it, it always appears …

MAC address can not be calculated: Error while setting up the PID file
PID file error -1

I'm not sure what to do next, because I just want to save my files from the htdocs in xamp and do the SQL work 🙁

Once I click on XAMPP, it says "Can not load stack definitions", that means I've lost my PHP files because I'm trying so hard to recover them, and I'm not sure what to do next to do is