I was going to change the Camo Gates in my cousin's dragon house thing from The Secret Rooms Mod to Drawbridges from Tinkers' Mechworks. I broke the center camo gate and placed a drawbridge but i was sent to the hub with a msg in chat saying "[MyM] You have been moved : Internal server error." I somehow broke the other two camo gates and a torch lever, being sent to the hub after placing or breaking a block next to the center drawbridge. I would be sent to the hub if i tried breaking the drawbridge, but when i came back it was still there. After right clicking the lever i was also sent back to the hub. One camo gate is in my inventory but i don't know where the lever or other camo gate went. I think it was because my inventory was full but i'm not really sure. When I first placed it i think it was disguised as a cobble stone block with 6 cobblestone blocks inside as well. I tried placing it facing sideways so that when powered it would close the entry, but somehow it stopped looking like cobblestone after a few crashes, and i saw it was facing down.
Yes, there is still a drawbridge at the north side of the house that sends me to the hub after I try to break it. However is isn't important that it is removed as he have no use for the dragon house at the moment.
After speaking with you I have gone ahead and removed the drawbridge which was causing the issues for you. marking as solved, feel free to post a new thread if you have new issues.