Hi
This is because that field did not publish through webservice. My assumption is that you published page 132 in order to use in Power BI
Go to Webservice then try Action -> New Document -> Create Dataset. Then try to use different options. The goal is that you use page 132 then get to the screenshot that you can select different fields to publish. Then you can select that field to publish and show up.
First try Edit and then see if you can find the Sales Invoice header web service then add the field to it if it worked.


