"This homebrew Subclass does not have the necessary class features with the correct required levels."

For D&D 5.5e (2024) Warlock. Have 2 features at level 3, 1 at 6, 1 at 10, 1 at 14, just as Warlocks normally have. Have attempted creating additional ones at the same levels, no luck. Have attempted giving a feature at level 1, no luck. Attempted to make them in line with 5e (2014) levels (changing the level 3 to 1), no luck. Have attempted the "re-press the main save button" trick many times, no luck.

I understand it's only an issue if you are trying to publish it, but I am trying to publish it as I'm making the subclass for someone that is not in one of my campaigns. This is the third time I've run into this bug, both of the previous times it magically was publishable after about 3-6 hours, not the case this time.