Using VISIO 2019 Automation API in a windows service (Session 0) now faults on opening a diagram. All previous releases of Visio 2016 and before work no issue. I have dumps of the faults but no at MS seems to want to fix this issue. Tried to figure out how to get premier support but it a feed back loop to technical incident with I did open Case #:26058606 but it end with saying to open premier contract. Sound expensive for a problem for something the Office 2019/365 developers should be fixing as Office 2019 does not operate like Office 2016. Office 2019 is defective and needs to be repaired but I cannot find any Office developers to resolve this issue. Maybe someone on this site can help.