Ok I'm at a loss. I'm still relatively new to this mod in terms of the more techy engines and fuels. Mostly was using it for the nuclear lightbulb and the x24/x48 liquid fuel tanks (which are now obsolete apparently...grr)
I've been trying out the other engine/fuel combinations, but no matter what I do I cannot get the vista fusion engine to work. I will set up the engine just like the description says (tried all the reactors), KerbalEngineer will tell me I have Dv and thrust, and I don't touch the pre-set LH2, Lqd Deuturium, and Lqd Tritium. As soon as I go in-world to test it, the game will say the Vista has zero LH2, Lqd Deuturium, and Lqd Tritium, and that I also have no Dv. Reverting back to the space hanger suddenly shows all the untouched levels at zero...which happened by magic I am assuming. I really want to use this engine due to it's high ISP and use for motherships, but I'm at the point of moving on or finding another mod. Any help?
A side note...I've tried googling this and checking youtube. Unfortunately most guides/videos are out of date and non-applicable anymore based on the current mod's version.