I also tried uninstalling the freedom planet mod, but to no avail.

Should be there if you scroll past the bottom of the hat menu- I've got all the hats, so it was in an "invisible box" at the bottom of the far left column. When I did it, my cursor disappeared and hat description changed to "Raz's Goggles."

If working correctly the hat will be in your inventory when you start up the game, don't even have to make it with yarns. It works alongside the lilac headband for me. Try unsub and resub.

Thank you, it's working now.

I do not see this mod or any others in the hat menu. I did unsub and resub a few times. I restarted the game a few times. I turned on the Beta Participation in Steam Settings and rebooted Steam. What else do I need to do?

Hey I'm having the same issue. It seems Hat in Time eats workshop downloads randomly. Resubbing doesn't fix it nor does reinstalling the game. Guess we just have to wait for another patch to fix it.