Also having the same issue with glAccount. The rest seems to work fine. Response: InternalServerError {"message":"VismaId: 17b053e2-1e50-4b74-86f2-3b23f0cca81f. Error inserting the customer. Object reference not set to an instance of an object."}. "glAccounts":{"sales":{"value":null}} ... View more

I'm also having this issue when trying to POST a new customer. Payment method is not doing it despite existing in the Visma ERP. Response: InternalServerError {"message":"VismaId: 6e4ccc27-f873-4d4e-8a14-410ae61564aa. Error inserting the customer. Object reference not set to an instance of an object."}. "defaultPaymentMethod": { "paymentMethodId":{"value":"01"}, "isDefault":{"value":false} } ... View more