Before I start, I'll quote the read-me included with TSLRCM 1.8
There were many changes to the game starting with Peragus, continuing with Telos, and . . . well pretty much all of the planets have had significant changes. Your vanilla save will likely NOT work.
What mods did you have on the game before? Did you have a previous version of TSLRCM?
Are there any other mods you may have installed? If so, what are all of their names and also provide a link to that mod so it might be evaluated.