Are these new device handlers you can update to smartthings list?

When in API and in “My device Handlers” you select update from repo - smartthings(master) you get huge list of device handlers, are these the ones that come up to the list where you can choose device handler to you newly added device ?

I tried to update one of them, but just got an error :

kuva

Are you using GitHub? If so check your GitHub credentials, maybe delete and re-add the github repo.