Error accessed none 'sprite' from node construction script in blueprint tiki

error accessed none ‘sprite’ from node construction script in blueprint tiki

Out of the blue my UE4 wouldnt save my Blueprint and now i get that message everytime i play in editor. I was trying to set a new flipbook, tested, didnt work, deleted it and the code i had implemented, tried to save and i couldn’t. now it’s auto-saved itself in this broken form. my character doesn’t appear in the map and when i `show COLLISION, it doenst move, it only looks right or left. All of the CharacterMovement (Inherited) Details have disappeared and i suspect other stuff to have for no reason.

This is my first project, please help me.