Lower pillbox collisions!

Hello, I recently installed a custom map mod (GABZ Pillbox V2) but when I installed it the lower pillbox area was colliding with the map I installed. For example inside there was a bunch of buggy invisible walls which stopped you from walking in certain places. When looking through the files of the map I downloaded there is already a main.lua containing RemoveIpl code. I am just wondering if anybody else has encountered this before and fixed it successfully? I understand there are a lot of other topics about this but not specifically for the lower pillbox area only the top. Thank you and I hope somebody gets back to me soon.

Ask the creator of the map for support.

Okay, thank you for your reply. I apologise about any inconvenience I have caused.