CustomPress Permissions Error

Hello!
I have an urgent question! I have a multi-site on vortexrealtor.com and this question is regarding the subsite portal.vortexrealtor.com
I have created a custom post type using CustomPress called "Transactions", as well as a custom user role called "Agents".
After updating some plugins, however, "Agents" are no longer to create "Transactions", and the error says "Cheatin huh? Sorry, you are not allowed to access this page."
This was working just fine before, but is not working now.
How can I fix this error, so that the custom user role "Agents" have access to this custom post type again?

Thank you very much for your help!