Fatal Scar error on first Ork Campaign

[Hunterxl]

Ok Right when I finish destroying the ork genrators to open the gate I get a scar error and it locks up on me. This is on the Disorder campaign. Any help would be appreciated.

[TBS]

This happens if you have the warboss garrissoned in a building or riding in a trukk - make sure he is on foot before blowing the generators.

[Hunterxl]

wow