I am unable to activate the "crown" (project management) feature and when I click the crown to activate it, it disappers .

Question

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Answer 1

Thanks for the screenshot. I have removed them to not disclose email addresses.

The problem is that the other user has not yet accepted the invitation to the survey project. They must open their projects in the user account, and accept the invitation. After that, you can give them the project lead (crown).