I am getting an error. can you help me?

I developed this game with construct 2 but now I want to upgrade. but this plugin fails. I cannot delete this because it is used in many parts of my game. what do you think i should do

You could delete the LiteTween behaviour using C2, then load your project in to C3.

C3 has an official Tween plugin, so you could recreate the missing events afterwards.

It's a bit tricky doing this blind, but you could open C2 with the original project, then do a search for "LiteTween" and then have C3 open at the same time to compare and re-add events.