Why can't it work in BlueStacks?

Says "an invalid signature was given by the binder" when trying to log in.

BlueStacks is an Android emulator.

That's really strange. Can you send a screenshot of how you're trying to run Geph?

How's this gonna help?

Can you make sure that the clock in the emulator is correct? The clock needs to be within 30 seconds of the correct time.

The clock is accurate according to Time.is