Hello, I’m not sure this is the proper place to report bugs about specific cores, please tell me if that’s not the case and there’s a but tracker somewhere.
Using RetroArch on Linux (Kubuntu 22.04), installed as a flatpak. For a long time, I’ve had issues loading PS2 content with the PCSX2 core and I’ve finally found out why: it doesn’t like special characters in paths. In my case, I had a directory named “ÉMULATION” from which I could never load PS2 content; it works after renaming it to “EMULATION” (without the accentuated É).
I haven’t encountered the same issues with other cores, they can load content from that dir/subdirs without issues, it seems to only happen with the PCSX2 core. Also, PCSX2 as a standalone (installed as flatpak too) has no issue with that dir.