I’m trying to set up a zap between Excel and Xero to make it easier to enter them on a monthly basis. The Excel side works, and finding/creating a contact in Xero works, but when I try test the creation of the bank transaction I get an error saying that the JSON for post data was invalid, Error converting value (Contact value) to type ‘System.Guild”. Does anyone have any suggestions?
![](https://uploads-us-west-2.insided.com/zapier-ca/attachment/89dada3b-868c-4cb5-b155-ab6c57f0aaf9.png)