Error when I try to open one of my copilots

Hi, 

I've created new copilots in Microsoft 365 > Copilot. Once published, I try to open them, but they don't display in the right side bar.

If I search the name of the copilot from the search bar in Microsoft 365, the name of the copilot is displayed > I click on it, and I get the following error message : "Unable to load the requested application. No static tabs configured". (translated from french)

Can you help me please ?