Reporting someone had nothing to do with why you were banned. You were banned for not returning screenshots. For some reason your game was not returning them properly. The error that I see is "Screenshot transfer incomplete." Most of the time this error is caused by lag on either the player or server side.
I use this plugin to check that someone is not using a PBSS blocker to hide a cheat.
I do not believe that you are cheating and the ban has been removed.
If you continue to have issues, please post back here and I will do what I can.