"The Project has not been configured yet, please validate your information."

I get this warning every time I start Unity. Searching this phrase in Google and these forums returns nothing.

Can someone please explain what this warning is and how I can get rid of it?

I’m on Unity 2021.2.17f1.

Never mind! Updating the Unity Hub seems to have fixed it. I’ll leave this post here so if anyone else gets the problem, there’s now a searchable answer.