Error during installation of custom app

Hi, I am trying to package an app myself, but when installing, I always get this error message:
“Die App konnte nicht installiert werden” (german)
“Couldn’t install app” (translated)

This happens, when I am packing my own app using the mksapg-tool (mksapkg -E -s -m WDMyCloud).

But it also happens, when I try to repack an app like phpSysInfo (without any changes to scripts or rc-file). The original phpSysInfo just worked fine.

I have the WDMyCloud gen2 with most recent firmware.

Does anyone have a tip on how to solve this?


I have not tried this, let’s see if another user can share some information or tips on this matter.