This error is most often seen with font files. If you are trying to open the font file in your design program, you may see this error. Instead of opening in your design program, please install the font to your device, then it will be accessible using the text tool in your program.
If you are getting this error on installation, please look at the name of the font file. If it begins with ._ (period underscore), you are inside of the MACOSX file.
The MACOSX file is a useless file which is created when a folder is zipped on a Mac and unzipped on a Windows computer. It is not a usable file.
To get the working file, please go back to your main folder, and you will see the regular files/folders listed below the MACSOX folder -- those are the ones you will want to choose.