Me as well. Strange that it doesn't let you disable whatever mod is the problem.

I tried the reset tech command. No luck with that. I then made a new world but "Fluid Handling" does not show up in the tech list. I added in the stuff for a quick cheaty research system to see if there was an issue with just my savegame. One of the other techs that wasn't registering prop...

Great mods and I love the complexity. However ... I seem to run into an issue after an Factorio update (or possible a Bob' or Angel Mod update). The technology "Fluid Handling" has disappeared even though I researched it (or I am pretty sure I did - so many techs to research so little time...