Hi @Michael Meissner,

Sorry to hear this! Please try to find a link to this board in your browser history. As you click it, you’ll see the popup to request access. A notification will be sent to the new owner of the board. 

Hope that helps!

@Michael Meissner - Additionally, if you know who the board owner is, you could reach out to them directly and request access.

I did the same, removed access to all groups from the board and then it disappeared. When I clicked on the link to request access, I received a message that an email was sent to the board owner (which is me) but I never received any emails. 

Any idea on how to find it?