"Mod organizer 1 Legacy (thanks enpinion): Recently Nexus changed their services to be compliant to the new EU rules. These changes required programs making use of them (such as MO1, NMM and MO2) to be updated to be able to still use Nexus integrations. Even though MO1 is End of Life and will not get any future updates, enpinion managed to get the Mo1 code to build and has been able to fix this issue. We discussed with Tannin (original creator of MO1 and Mo2) and decided to host here the fixed Legacy version. This does not mean that Mo1 will receive any further updates, or that it is supported in any way. The Mo2 team will continue to work on Mo2 and strive to make it the better program." -per mo2's description about the mo legacy version so it sounds like this is indeed what is causing us not to be able to log in and for now atleast that's a work around using the legacy version from under mo2's downloads section.