have you tried rebugs 999 downgrader pup file try that if it works install rebug toolbox and got to rebug settings below network setting enable rebug update then go to toolbox all way to right says toggole qa flag enable this ...then you can got to any ofw or cfw 3.55 if i was a help +rep.....i have also seen this alot 80010017 with pkgs signed for diff cfw