I am getting file path "/document/acc=1;doc=13" using Xamarin File Picker Plugin from android device

I am using this xamarin file picker plugin:

https://github.com/Studyxnet/FilePicker-Plugin-for-Xamarin-and-Windows

but I am getting return value as media object with 0 file size like:

{byte[0]}

"sample.pdf"

"/document/acc=1;doc=14"

this is happening when trying to upload pdf using android 5.1 and 6.0.1 from Downloads or google drive. Has any one face this problem before?