I saw another user, Kalmana, had the same issue. I wasn’t able to use the knife tool in this section for some reason. After following the solution from that topic, merging the vertexes, my issue is solved. I’m just not sure how I caused it in the first place.
It might be a good idea to pin Kalmana’s topic or something similar if others have the same issue. Thanks!
Thanks. It is one of the most common beginner problems. Double geometry that needs merging.