I am getting this error at the top of a webform (in the civi section):
Warning: Invalid argument supplied for foreach() in wf_crm_admin_form->buildParticipantTab() (line 930 of /home/site1/public_html/sites/all/modules/webform_civicrm/includes/wf_crm_admin_form.inc).
It happens when a contact is added to an event. I have attached a screen capture.
A new part in the form has appeared. No idea where from. I think this might be causing the issue. See attached for for more information.