Title says it all, using the must current updated version of Paid Ranks which is suppose to support group manager. Very simply, your permissions do not seem to work, while on any other plugin they work just find. I've already checked all the relevant files and ymls through a parser, and when I OP myself It works just fine. Maybe I am missing something?
Error.zip

I've since moved onto Luckperms, everything works perfectly. I don't believe your plugin is compatible with Group Manager just yet.