Howdy!
We are certainly aware of a few issues that popped up with the campaign after the last major patch. These are being investigated by our team for a fix in a future update. Until that point it is best to restart the mission and use the cheat code: AllYourBaseAreBelongToUs
That will allow you to get past the missions impacted by this issue and still play most of the campaign.
To clarify our team is already aware of this issue and is on the case to get it resolved.
Thank you.