Here you go.
Could you try disabling Substance in your project and then packaging for Development to see if it will work when Substance isnāt included in your project? I just realized that I havenāt been using it as I havenāt had access to Substance.
How do I disable it?
There are multiple ways but the simplest would be to right-click your .uproject file for the project and edit it with Notepad or another text editing software. Around halfway down, you should see:
āNameā: āSubstanceā,
āEnabledā: true,
Please change ātrueā to āfalseā, save the .uproject file, and it should be disabled.
It works perfectly fine now. WE FOUND THE CULPRIT!
All this back and forth. it was as simple as disabling a plug in.
Thank you so much for your help.
CONGRATULATIONS
Thanks to you too saeedc