With the new email@example.com I was getting this error:
And after some searching I pinpointed it to this:
at line 91 in titanium/lib/cli.js. After some digging I found out that my /usr/bin/node was a symlink to /etc/alternatives/node which was again a symlink to /usr/bin/nodejs so when the if statement was performed there was no shifting in argv thus leading to the error. I changed cli.js not to include the if statement there and just apply shift() and now everything works.