Thanks for the update Fuiba! I uploaded version 2.11 and all the missions that did not load before that I managed to test tonight work perfectly [direct link to the ACE mission tab]
One small problem I encountered in "aversus" - a radio message saying the Armor was destroyed is appearing right at the beginning of the mission. I played some more into it and was attacked by a Hind and infantry. Not sure whether the Armor should have came already, but maybe that message appearing at the beginning of the mission indicates on another problem.
Don't worry about the addons bug... It's really worth while for us to receive high quality missions just at the cost of encountering a bug here and there. Thanks a lot again!