This is a bit weird. When I set RapidPHP (v15.5.0.207) interface style to Flat Dark, then the file open dialog apparently loses characters from folder and file names. But if I actually click on an icon or the space where the file/folder name should appear, then it shows up in white. Screenshot at https://drive.google.com/file/d/1Y0Gi5TSUniq3gYQZ3Qw3YZrrvzYygh3T/view?usp=sharing
This could be a problem with RapidPHP or Windows 10 system, not sure.