Issues using addons (specifically the outlook-verify-sensitivity-label)

[maxsilvernagel]

I am trying to test out this addon, and I cannot seem to get things working, and any/all documentation I can find online assumes that users are very familiar with NPM, NodeJS, etc. in setting this up and hosting things.
I downloaded the manifest.xml file from the Samples/outlook-verify-sensitivity-label/manifest-configurations/add-in-only/manifest.xml location. Based on the "try it out" steps, I should be able to just load this into Web Outlook as a custom addon, send a test email to the fictional fabrikam.com address and it will work, as "The add-in web files are served from this GitHub repository"

When I load the xml file and send a test email or change the email labels, it simply does not run anything, and I am rather confused on where to go from here. Even if there is just a guide to follow on setting this up, that would be immensely appreciated, as again I am new to all of this and there does not seem to ever be more detail in the MS documentation than "host the files using NPM" or other one-liners.

Thank you!

[AlexJerabek]

Are you able to follow and run the Outlook add-in quick start?

https://learn.microsoft.com/en-us/office/dev/add-ins/quickstarts/outlook-quickstart-yo

[maxsilvernagel]

I had tried those steps, but had run into issues where various NPM/NodeJS combinations did not work with Yeomen Generator, and I did not have the time to learn how to resolve that (and, I was facing the same issues with not knowing how to actually host and connect things together). I have since making this comment planned to bring some more knowledgeable people from another department in to help me out, but I had wanted to at least get a basic example working to see how it behaved between the Outlook clients (web vs desktop), even if it means, as is implied in the Readme, that it will be a non-modifiable example.