Activation Error

This is caused because the theme you are using (I believe it is Simple Mag) is using an out-of-date version of TGMPA (https://tgmpluginactivation.com/).

Please contact the theme developer and ask them to update to TGMPA version 2.6.1

This was tracked and fixed back in 2014: https://github.com/TGMPA/TGM-Plugin-Activation/pull/207

OK, thanks for letting me know ??