I am trying to learn MS Teams app development. I am following this link for the same. But when I run the app with local debug in teams toolkit, I am getting 404 error when it is trying to create new tab. I have enabled sideloading. I can see the app in teams personal tab working. The issue occurs only in Teams tab set up. Please see below screenshot for the same:

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Thanks in advance.

1 Answer 1


It was a silly mistake. We need to publish the app to add it in teams channel tab. Local debug can showcase you the outcome in the teams personal tab only.

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