This mod doesn't install using the mod system. It installs by unzipping and dropping the files straight into the game directory (the "files" folder in the zip and the "files" in the game's root directory should be merged).
The error above basically says that it can not find one of the mod's files (ManInfo.gd). The most likely cause is that the file is in the wrong place.
Let me know if that isn't the problem.
Sidenote: I'm making the assumption/hope that you included the full error log. The most important error is the first error in that window, rather than the last. If that isn't the first error, then my above response may not be relevant. You'll need to make a new post that includes the first error.