I am working on getting D2ID set up and I am encountering a challenge.
After following the steps, pressing the 'generate' button doesn't seem
to give me a key.

For clarity, here's a short youtube video showing exactly how things
look on my end:

I tried all the normal stuff, like restarting the computer, closing
and reopening the applications in different orders etc. I assume there
is some step I am missing. Any help would be appreciated, thanks very
much!

D2ID stopped getting updates couple years ago and no longer works. We built diablo.run as an alternative. https://diablo.run/setup

Thanks, this looks a lot better. Similar issue, when I go to configure the twitch extension to add an overlay for diablorun, it asks me to enter my username and hit the 'save settings' button. But when I hit 'save settings' nothing seems to happen.

The diablorun button is on my stream's overlay, but clicking it doesn't bring up any info, just asks me to configure the extension.

The currently available diablo.run extension was not made by us and it's closed source. It stopped working as well some time ago and we built our own extension, but it's stuck at Twitch review process. Can take up to 2 weeks. It's been a week since we submitted it so should be available soon.

Cheers mate, thanks for the fast helpful answers.