If you check your folder/file Logs->FrameXML.log you will probably notice that the client fails to load a lot of library-files for your addons. They are simply missing in the download-package. You can fix this by downloading and adding the missing libraries from here: https://www.wowace.com/

Example: https://www.wowace.com/projects/libgratuity-3-0/files

If certain custom files or localizations are missing, you can modify your <addon>.toc-file which contains a list of what to load. Simply delete that entry.