Seems like, last time I went here nobody could post their works.
I changed all settings to defaults to see if that would be working again; I also cleared up some space at "Featured", that is our most-used folder:
( by moving early submissions there to their correspondent folders; it worked before )
We already had a similar issue when that folder was full, so I guess that, once with some spared space, it would allow posting again!
Let me know if that´s woking or not, please.