All my gear is able to transmog but yet it makes some odd sound when I hit the apply button. Tried changing the mogs, changing the set, remounting, relogging, reloading. Everything nothing fixes it. I have the gold. and the gear has all been mogged before.
Did you change covenants recently? If so, try removing your weapons and then transmogging.
does that work
It has for some since the weapons were related to a specific covenant that the player was no longer associated with.