Hello. Currently I have two multiserver installations, the old one with ISPconfig (188.8.131.52p9) in Debian 7 and the new one, with ispconfig 3.1.2 in Ubuntu 16.04. I want to perform a manual migration of the mail data (only account names and passwords). In the past I used de mail import tool that comes with ISPconfig without problems. I've created a remote user in the old server and when I try to connect then in the new server gives me an error: CSRF attempt blocked. What I missed up?