Dears,
I have the above mentioned error when I am trying to create a ticket from email, via customer portal and also from the admin panel.
Recently we moved from server to cloud, no changes has been made regarding fields, neither rights. As we have different issue types but with the same fieldset, I would say that there will be a problem with the fields, however, I can not find out what is the problem exactly.
I would really appreciate your help with this case. Thank you!