GS13: Invalid Argument To Date Encode

Hi ladies and gents, I've searched through the forums for this issue, and have only found topics relating to previous GS versions (10 and 11 etc.).

As the topic indicates, I am getting the mentioned error when trying to check out a scouts specific information. I have uninstalled and reinstalled GS13, and still have the same issue. Also upon reinstalling GS13, after placing the key file back into the relevant folder, I am now seeing the advert banner on the left side of GS, as well as being prompted to donate to the "g" edition, which I have already done so.

Update: I've sorted the issue with my "g" version thanks to the help of Randy =)