The 2048 tag on the main site was not allowing edits, saying that the tag was banned.
Sorry about this; this was my bad. It was impacting an API. I verified that we didn't have pure numeric tags on some number of sites, but I obviously failed and didn't thoroughly check all of them, which is my error. I will find another approach for the problem that I was trying to fix. The code has already been reverted. 2048 should work fine now; let me know if you need me to migrate the tag back to what it was. Again, sorry.
It has been renamed to 2048-game.