Login error: Cannot reach the Nexus login server. Either your firewall is blocking NMM or the login server is down. I cannot seem to get an answer to this error. Nexus the firewall is blocking NMM or the login server is down. Yet I can manually download the modification from Nexus but cannot load via NMM as it requires a user name and password but filling these two in does nothing and gives me the 'login error' mentioned above. I have refreshed Firefox and have reinstalled the NMM latest version. Nothing changes. Anyone know what might be going on here? Is it just me or is this a problem for others as well? I am frustrated since I have tried all the tricks I know to try and get this issue resolved. I am out of ideas and help.