Here is the fix for the missed mission trigger. Good luck.
Edit: This FIX works I have used it. And it isn't too difficult to do. Just follow the directions given by the kind soul who figured it out. Though I would recommend only rolling back the numbers a few thousand each at most. Not halving them. Otherwise you'll be waiting between one to two days (game-time) to get the triggers.
So basically this returns Wargot Ship Probe & Cultist-Wargot Collaboration to unfinished research. My recommendation is to subtract a few thousand from Collaboration and half that for Probe. Then when returning to your saved game (in-game) don't forget to add them back to the research ques. Put them at the top of your list of course. :mad:
You'll get the failed Ship Probe cut scene and then the Collaboration will trigger the mission to attack a Cultist base to find the info needed to continue the plot-line. So above all be sure the Cultists have a base. Remember wiping them off the map automatically gives them three provinces. And one or two are bases. Good luck and have fun.
Thanks again to those who took the time to post this info and toy with the saved game file so that we could continue reclaiming Earth for the good of all mankind.