Issue submitting to Multi-Picklist

I have a form which submits a multi-select gravity forms field to a defined multi-pick field in salesforce.

Everytime it gets an error when trying to submit via Salesforce API. The error shown is:

Errors when adding to Salesforce (Lead): Subject Area Interests: bad value for restricted picklist field: [“Diplomacy and Governance”

This occurs whether there is 1 or many values selected in the picklist.

I tried the function that uses “;” instead of “,” but that did not change anything.

What can I do to fix this?

Thanks!