it says that that this profile is already used in this directory then even if i press run away it just wont open

whenever i try to open minecraft it will do the loading animation but then not open, then if i press it again says that this profile is already being used in this directory and if i press run away it will do the same this as the first time i tried. i've tried for a while now and tried many different ways and suggestions but whatever i do it just won't open. when this started to happen i was playing RL craft on forge-1.12.2-14.23.5.2854. also whenever i close minecraft launcher i can't reopen until i shutdown my computer. plss help me i realy wna get back on minecraft