Outlook is acting up. I guess it doesn't like a new OS build upgrade. It said it need my passport but it doesn't prompt me anything. It took me 30-40 mins to try a few solutions. Here is the solution that works for me.
You've used the swagger + Web API for many times but now, you are getting this 500.30 error and you can't figure out why. Your gut tell you that there might be some tiny mistakes that you made somewhere. Does it sound familiar?