I've been playing around with this for a few hours and I think that it is an upstream bug. I've setup a new Phabricator host and I can't seem to create the first (admin) user account. Steps to reproduce:
- Setup a new Phabricator installation.
- Initialize the database schema.
- Navigate to /auth/register and complete the form.
- Hit submit.
I always seem to get an exception:
Unhandled Exception ("AphrontMalformedRequestException") You are trying to save some data to Phabricator, but the request your browser made included an incorrect token. Reload the page and try again. You may need to clear your cookies. This was a Web request. This request had an invalid CSRF token.