Dear Mahmood,
I have the same problem, I can’t select a specific category.
I think the problem is because you didn’t upload the latest version on the download page you see 2.2.1 but when you download the file is says 2.2.0 in the zip file. I checked your GitHub page there is also showing 2.2.0.
Please upload the latest file and maybe then the problem is resolved, I have the problem on my site.
Kind Regards,
Sara M.