Uploading a file crashes Desktop App Web Viewer
问题 We are facing problems while uploading files via our o365 addin on Windows. In the compose mode, we launch a iframed app via a ribbon button. This iframed app which launches in a Desktop App Web Viewer allows users to upload files. The problem is that as soon as the users are done selecting the files they want to upload, the Desktop App Web Viewer crashes and we are back to the compose view. This happens intermittently but is frequent enough to be problematic. I looked at some Office JS