My main world states I can't earn achievements, but it gives no settings that I can set to fix it. The only change I made to the world was enabling an add-on featured on the marketplace. The only reason I added it as I had read it would not impact achievements. I have since deleted the add-on. Link to the add-on. https://www.minecraft.net/en-us/marketplace/pdp?id=181c5ffd-a694-4418-9d46-969903678d13
How do I fix this?
Adding an add-on to a world permanently disables achievements. This is not a bug.