UPDATE: FIXED.
I keep receiving a "There was a problem with your submission. Errors have been highlighted below" error notification when clicking on submit on the first page of a muti-step form. Also, no errors are actually highlighted on the page.
I am currently using the latest version of the plugin - 1.6.8.1
I am not using the picatcha field.
And it give me the same error message in the Gravity form's preview mode.
Thanks