Yes, The N3DS version is installed normally and I did a CTR transfer to both 11.2 and 11.5 as well as a normal downgrade to 9.2 using SysDowngrader. None of that fixed the issue for me.
I do post bugs on github but I am not sure where with this one because this does not seem to be a CFW related...
First of all small background. I once had a working Menuhax with ReiNAND and an EmuNAND (11.3E) on my N3DSXL 9.2 (European) but at some point games stopped launching on the system. I am talking about legit cartridge games here. The system kept saying "An Error Occurred" with no code or anything...