I’m trying to use service for data hub but getting this error. “External entity 'MyFirstModule.Customers_2' referenced by the widget 'textBox3' on the page 'MyFirstModule.Customers_2_NewEdit' cannot be committed. To persist changes to an external object on a page, use a microflow that has a 'Send external object' activity.”
you have to replace the “Save” button on your _NewEdit page with your own button, calling a microflow. This microflow will take the External Entity (Customers_2) as an input, you can then use the “Send external object” activity to send back the created/updated object.
Link to documentation: https://docs.mendix.com/refguide/send-external-object/