My first thought is the cable is too tight, start by going full in on the barrel adjuster, force the chain to the small cog if needed, loosen the pinch bolt, screw the barrel adjuster out a few clicks, pull the cable lightly taught, tighten the pinch bolt, adjust tension again.

If cable tension reset doesn't work, start from the beginning by removing the chain, and align the jockey wheel. The high adjustment screw on mine looks like it is all the way out, although it has three threads remaining on the other side. You can view from the underside to be sure a thread is showing. With the chain off, if the high limit screw is all the way out, and the jockey is not close to aligned, then you know something else is amiss, and if there is a bent hanger, you will be able see the jockey is off kilter.

What change was made that resulted in the need for readjustment?