Most of our activations are not going through today, all of them failing at the "Impact Changes" step of activation. Anyone else facing this issue as well? (We're using SC 2020.1.8.1 and SC Ext Mgmt 2020.1.3.2)

We had similar issue related to impact changes. NS support recommendation is to review the assets/img folders of any customized theme you are trying to deploy to delete any .tmp "images" files of size 0B and try activation again. Let me know if that works.