Install Playeranimator Version 190 Or Later ((link))

Launch your game normally. The error should no longer appear. Important Notes

The error message "Install PlayerAnimator version 1.0.2 or later"

Installing a library mod is identical to installing a standard mod. Press Win + R on your keyboard. Type %appdata% and hit Enter. Open the .minecraft folder. Locate the mods folder (if it doesn't exist, create it).