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[REWRITTEN] How can I allow an outside program to access programs inside the sandbox?

I want a launcher to be able to access programs in the sandbox. The launcher thinks the programs crashed when they're isolated, so I lose functionality. I tried the Resource Access settings but I don't think I did it properly since it didn't work. For example, I tried Window Access and put in the class from WinSpy of the unsandboxed launcher, but it didn't work.

The launcher also crashes when I sandbox it so that's not an option sadly.