Why is my Launch button greyed out?

Hello everyone, simple problem: My Launch button is greyed out…anyone know why this is?

Thanks in advance!

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I med the same issue and I recompiled C++ code and built the lighting. Then everything worked fine.

I got the same problem 4.26

Go back into Android Phone → Settings → Developer options → Turn USB debugging off and back on. Then the little popup comes back to allow debugging. If not, unplug and plug phone back in and it worked