It looks like you unzipped all the files into a subdirectory in "game" called "ChikasFirev0201". That's going to give you errors - it means there's duplicates of a lot of the *.rpy material now, and Ren'Py doesn't have a system for deconflicting when multiple labels have the same name, that sort of thing. We need to get the 'vanilla' Fill Me Up files overwritten by the Chika's Fire ones, not supplemented by them.
If I'm not mistaken : You can look now you'll see that there's a script.rpy in "game" and in "game/ChikasFirev0201", right? A lot of that kind of doubling-up? That's the issue, if true.
Delete the whole ChikasFirev0201 directory, then try re-extracting the zip such that all the contents 'overlap' with the existing files. So the script.rpy in the zip file overwrites the script.rpy that's in the "game" folder, the screens.rpy in the zip file overwrites the screens.rpy that's in the "game" folder, etc etc.