You installed an outdated version of a settlement mod that split its framework into a separate download. Fix: Return to the mod’s Nexus page. Look for a "Requirements" dropdown. Download the optional file labeled "PPF Core" or "Power Pipeline Master."
(Elder Scrolls Master) file, it acts as a "master" that other mods can use as a dependency. It is required for the main plugin to function correctly. Recommended Load Order Because it is a master file, Fallout 4 Ppf.esm
(Previsibines Processing Framework) is a core master file for You installed an outdated version of a settlement
This is the #1 support ticket for settlement mods. Here are the three most common scenarios: Fallout 4 Ppf.esm