Thanks for the response. I was able to solve the issue last night with a friend. I initially watched the video you shared to learn how to add Adobe Fonts. When I got to the step where I copy/paste the API token into the Integrations panel and hit ‘save,’ the save button was greyed out and I couldn’t save it.
My friend (who’s more advanced at troubleshooting) asked me to delete the API token, click ‘save’ with the empty box and then try adding it again, and it worked. It’s still a mystery what the problem was but just glad I got it resolved.
I had upgraded my free plan to Lite thinking that was the reason, so now I need to sort that out as well.