To my understanding, this mod hides the research for the vanilla Distractor and Destroyer by default, which makes any tech that has them as a prerequisite unresearchable. So far I've noticed that the electric weapons damage tech cannot be started as well as the tier 4 follower count. I've not checked the option to play with vanilla bots as well, so I'm unsure if that's a workaround for this.

Thanks for the heads up. I replaced the destroyer prerequisite from follower-robot-count-4 and electric-weapons-damage-1 with the defender technology. With this, both technologies should now be researchable.