I need help connecting mail chimp to Salesforce

"Read" permission to field "MC4SF__Prompt_For_Full_Sync__c" on object "MC4SF__MC_List__c" is not allowed for the current user.

Error is in expression '{!initPage}' in component <apex:page> in page mc4sf:setup: (MC4SF)

An unexpected error has occurred. Your solution provider has been notified. (MC4SF)