I created a new form hosted on my server. when I click submit, I receive this error message:
Your form could not be submitted for the following reason(s):
•Warning: [ err 2/line 391/config.cls.php] session_start(): open(/var/lib/php/session/sess_gm2ge5r0ch0gr1r7b1aqm1aks4, O_RDWR) failed: Permission denied (13)

It has happened on two different servers.

I have had forms that worked previously now get this error message, even though nothing on the form has changed.
is there a new version of php that is causing the problem, or something else?

Hi Larry,

I don't believe anything changed with PHP in Webform Builder. You may want to check with your host to see if they changed anything on the server. Usually problems with forms are because the PHP is not up to date or it is not enabled.

If you can provide a link to your site we'd be able to tell you for sure...but that error is because php sessions is not enabled. This is something your hosting service can fix for you. Have them enable php sessions and you should be good to go.

http://www.coffeecup.com/help/articles/what-are-the-server-requirements-to-use-web-form-builder/