animation not playing in game mode or showing up on animated object HELP!!!!!!

ok so i created an animation for an object that rotated it and everything was working but then i tried to change it from animator to animation and the animation crashed. it will play in preview mode but not in play mode. plus the animation component will not show up on the object im animating. does anyone know how to help me. also does anyone know if there is a simple way to go between animation and animator??? im really lost and would appreciate any help. THX

You should be able to have Animation and Animator open at the same time just fine, I do it often. Not sure how to fix the data if it’s damaged though, perhaps you would save time just going back and reconstructing it again? Not sure how complex your animation is or how long it took you to create.