Unable to create new fields

I’m testing the beta version 7.2.0 Beta 2. all attempts to create a new field within the Stuiod results in the following error message:

Warning: Creating default object from empty value in /var/www/html/suitecrm/modules/ModuleBuilder/views/view.modulefield.php on line 151
{"east":{"title":"Edit Field","crumb":"","content":"

This is simply a warning.

Please disable notices/warnings in your php.ini.