I am currently working with an office word addin using Angular, and I had already sideload my office addin as documented in this post. And I was able to add them from the Insert Menu -> My Add-ins ribbon, by opening the Shared Folder menu. My issue is that, all of a sudden the Shared Folder menu is not visible anymore.
Please be noted that I had already tried the refresh button on the right corner. I have also tried sideload the add in again, by creating a new shared folder. But nothing helped. Have you ever faced this issue?