Might be because Propellium is not a stock or CRP resource - it is only in Classic Stock Resources. A missing resource definition can mess up a lot of things. @Angel-125, could you add in some play modes to use liquid fuel (simplified), LqdHydrogen (CRP), and Propellium (classic stock)
Also, Explodium is only in Classic Stock, but when you install the DSEV CRP play mode, it still uses explodium to fuel the Trinity engine - throwing a whole bunch of errors.