Tessitura Error: What does "The membership level (LevelId = XX) does not belong to the campaign's (CampaignId = XXX) membership organization." mean and how can I fix it?

Resource: Web/Cart/MembershipsLevelFirst

Error: The membership level (LevelId = XX) does not belong to the campaign's (CampaignId = XXX) membership organization.

Payload:

{
    "FundId": "X",
    "MembershipLevelId": XX
}

The issue is likely the Fund selected at the button level in the Membership Configuration. Just update it to the correct fund, then resend the job from the 2Account dashboard.