I am working on installing Cerium on Xenforo 1.5.12 Tried to install file that is labeled "install first" and I receive the error "not a valid XMl file". Looking at the file it looks like an add-on and not a complete style. On the file that labeled "install 2nd" - This is a style file and I tried to install this first just as a test. It did give the message that it installed correctly. But viewing the template it did not install all the needed components. It must need the add-on components to work correctly. At this point I did try to install the "install first" file as an add-on. But receive the error - "The files associated with this add-on could not be found. Please upload them and try again" What am I doing wrong? Thanks