The context of the button is the dataview with entity ‘Default_data_for_items’. As far as the image shows, no other elements surrounding the group box.
The microflow that you have attached to the button, requires an object of entity ‘RFQ_Header_Data’. And that object is not available in this context.
In order to solve this error, you have to change the microflow’s parameter-type to a ‘Default_data_for_items’ instead of ‘RFQ_Header_Data’.