"You must select a Contact associated with this Household Account" Error

If you have an older Salesforce NPSP installation, you may have enabled "Enhanced Recurring Donations". For all 2023 and later installations, this is enabled by default. Where you have enabled this feature, some of your historical recurring donations maybe be set up in a way that is incompatible with this new way of processing recurring donations.

If you are encountering this error, we suggest you work through the following support article from Salesforce, discuss this with your Salesforce partner or lastly, contact the MoveData support desk.

Reference: https://help.salesforce.com/s/articleView?id=000394634&type=1