missing potion means they failed to merge ccmod with your mod, and maybe the rest of the error. the rest most likely because failed merge.
i merge v130 + ccmod + tweaks + multi-marriage + my preg edit and I can still play normally in story or free mode.
Started new free game (imported save), added 8 chars. Saved. Closed game. Loaded. Checked log for errors, no errors. Slept in inn and again checked log for errors, no errors... v130 + en130 + tweaks 1.0.130 . Maybe they are appearing much later after many actions but for now I dont see any errors....
No, I was using only his mod then. Though I think I found the cause.
What I think happened is I was using ccmod on a different save, then made a new save with it and your installed at first. This altered the flags in the save I think. After the first CTD, I tried taking the mods out one at a time and tested individually, still getting the crashes.
I then made a new save without the mods installed, and then added ccmod, got the crash, but probably also corrupted my save, and then tested your mod not realizing it had corrupted my save.
I think this is the setting that cause it.
If 0 it doesn't seem to cause problems.
I am confused on the potions one as yeah that is no longer popping up ether, but I never merged the mods so was only using one or the other after being told they needed to be merged to use together. And was getting the pop ups when used on its own, which shouldn't be tied to saves if its before the main menu.
I did redownload both mods, so maybe it was a faulty download or unzip? Unsure.