Hi @Sabrin Byaah,
you should have an invitation to sign it to Trello when you insert a card on the Confluence page:
Before you can see a card or board, you'll be asked to sign in to Trello. Any content you don't have permission to see will display a note letting you know that you don't have the necessary access to view it yet.
I have taken this quote from the guide on how to use Trello and Confluence together: https://confluence.atlassian.com/confcloud/use-trello-and-confluence-together-943978256.html.
Hope this helps.
Any new about this issue ? I am facing the same issue.
I created a board for my team. Now I am trying to add it a trello board in a confluence page but everytime I get a message telling me that the board was not found and that it may be private. I am logged in Trello.
Does the Trello board need to be public ?
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