I have followed some directions exactly on a youtube video for deploying a provider hosted add in from visual studio 2017. The youtube video also matches the Microsoft docs. I signed up for a new O365 tenant and have provisioned a single developer site collection in the SharePoint Admin Center.
Yet, at the final step where I upload my .app file to the developer site, SharePoint provides a vague error message. How can I get a more detailed error message to try and figure out what has gone wrong?