Active exhaust issues

Just installed aftermarket exhaust and my active exhaust worked immediately after install but now it won't properly change modes without reverting back to normal.

I know I need to take it back to get it fixed but is there anything I need to know or can do to help my problem?

Also bonus question, just installed a JLT intake without getting a tune, engine is now giving me check engine light, is it safe to drive until my tune comes in through the cloud?