MCC Forge can't save maps.

I’ve been having trouble with forge mode in MCC. Going for the “save 5 maps” achievement, but i’ve only been able to save three maps, it just won’t let me save any maps. I’ve deleted a map in case there was a limit but I can’t save any new maps at all. It asks me for the map name but doesn’t ask for description and then there is no map saved.

Anyone have a similar problem?

And today I was able to save maps. Very confusing. Achievement unlocked though. So there’s that.