We can´t make any vehicle in Wintergrasp last battle.

I don't know if the alliance had cheated or not to keep Wintergrasp but even though we had the workshops taken we couldn't build vehicles and they beat us because of that, please review and take necessary measures.

There's a limit on vehicle amount that can currently be created by each faction. The more workshops you have the more vehicles you can make. Did you check if Horde had max vehicles created?

It was not that, in the workshop although it was ours, it came out that it was from the alliance therefore we could not build vehicles, I have photos but I do not know how to upload them here.

Yeah Wintergrasp is currently bugged, no one can capture workshops