New front door handle/deadbolt installation will not lock from inside house using knob will lock from outside using key but key will not come out until key is turned back into unlock position
Your knob and key are out of sync. Split the lock. Rotate the knob 90 degrees or 180 if 90 isn't an option. Screw the lock back together. I ran into this exact issue with a double cylinder deadbolt when installing it in our home.