I get the following error when I load the newest versions of your mod Krastorio 2 and Space Exploration:

Failed to load mods: Difficulty normal: Cycle in technology tree detected.

rocket-fuel
-> utility-science-pack
->rocket-fuel

I know it is the combination of these two mods because loading each mod separately worked perfectly. Wondering if you had a fix?

What other mods do you have installed? I can't reproduce it.

I'm seeing the same cycle with Angel's petrochemical. I imagine the rocket fuel tech got moved up a level because of the increased difficulty of creating rocket fuel.

If enable only Krastorio 2 + Angel's = game run.
Also with only Space Exploration + Angel's = game run.
But with K2 + SE + Angel's = game crush with "rocket-fuel".