I set up one for each level, so there are 20  different level ups. I tried adding all the levels in one, but it kept giving me an error. I tried posting a pic of it, but it wouldn't work either.

To post a pic you must first host it on a site like www.imgur.com, then you need the “direct link” that ends in .jpg

When you set it up, you need to set it up like this:

That’s👆how you would set it up for 2nd-level. The two fields marked with an asterisk need to increase by 1 for every level after that.

Might I refer you to the General Homebrew FAQ #s 3 & 4: (https://www.dndbeyond.com/forums/dungeons-dragons-discussion/homebrew-house-rules/131411-a-homebrewers-how-to-faq), I think you might find those answers of additional usefulness.

Yes!!! That was the problem - thank you so much!I felt like I was taking crazy pills! It works perfectly now. Much appreciated.