At your place I try ldosbox for comparison. This confirms or excludes magic dosbox like a source of problem. You can loading from private folder, to prevent problems with storage permissions. In addition, i would check files permissions in supaplex folder. If are only for read then it can be problem. This device has modified custom android. There can be numerous problems. With “normal” core we eliminated issues with dynamic recompiler. I will help regardless of magic dosbox version.