I cannot save changes for my Salesforce sync settings

Issue

When I try to make changes to my Salesforce sync settings for account, contact or ticket syncs, the Save button doesn't work. I'm not seeing any error message, but when I click the button, nothing happens. How can I fix this?

Cause

This can happen if a mapped field has been removed. This is what the error looks like in the interface. You get this error if the previously-mapped field is deactivated or deleted. Select another field or delete this mapping.

There may be multiple fields impacted by the issue. This incorrect mapping can occur if a field is deactivated or deleted while while still mapped in the integration settings.

Resolution

Incorrectly mapped fields must be removed. Map any field, then delete:

If there are multiple incorrectly mapped fields, map all of them before you click Save. If you click Save and nothing happens, perform a hard refresh for the page and retry.