Minecraft Crashing

So when I go to load into Minecraft it stops on 46% and waits about 10 seconds and goes to 56% and crashes. This started to happen when I went to the files and put an 'Mc.addon mod folder' to the 'behaviour pack' folder in the Minecraft files. And next time I went to log into Minecraft it started to happen. If its able to be fixed I would be very pleased and the glitch started to happen on the 07/07/2021.

 

-Thank You

Jay