I have followed these exact steps.
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Go to https://marketplace.zoom.us and sign in. -
Click "Manage" in the top right corner. -
Under "Personal App Management," click "Created Apps." -
Find your JWT App by looking at the "Type" column. -
Click "Activation" on the left. -
Then click "Activate your App" and confirm it.
That is when I get the error owner_removed, when I try to Activate my App.