model field does not exist

I’ve created a filtered Campaign model to work around a bug involving multi picklist fields. The resolution of this issue has the details of my setup.
https://community.skuidify.com/skuid/topics/how-do-i-filter-a-reference-field-using-a-multi-select-p…
The page creates an Opportunity, and when I attempt to save it I get an error stating that the CampaignTypes field on the Opportunity model does not exist.

Found another post related to this.

https://community.skuidify.com/skuid/topics/condition-field-from-another-model-issue-when-row-exists…

Only difference is my field is UI Only, so I cannot insert a value into the record.