keep getting an error message

[aiman.h.kallaf]

I keep getting this error message when trying to upload xml file to install adons
i tried more than one addon
Error
Please enter a valid callback method


i keep getting the error from both my local host and the server

 

[aiman.h.kallaf]

i recorded what i'm doing , find the file attached

 

[Jake Bunce]

That likely means you haven't uploaded the files for the addon, or they were uploaded incorrectly. The addon should have a directory inside of the library/ directory.