Unreal 5.4 package android ETC2 Error Unknow, please help?

Hello there @Gladiador2690! Let’s see what we can do here.

Another thread with the same error logs as yours suggest a hardware conflict, which would depend on your current motherboard and CPU setup. Please check the details here:

Alternatively, other cases suggest confclits with any active capture/record software in the background, like ShareX. Please test disabling any present software in your end, then test the engine once again.

Finally, to rule out video issues, please make sure to update your nVIDIA drivers, picking the “Clean Installation” option, as well as going for the “Developer” drivers, as these have more stable settings for engine work.