This preview needs to open in a separate browser tab (Design mode)

Hello,
In all my projects, I get a message that says, “This preview needs to open in a separate browser tab. Open in a new tab to continue.”

I can no longer use the design mode feature with prompts to edit my UI.

Do you know why this is happening and how I can get the preview to open in the same window?

I am also having the same issue, and asking AI to edit my UI is costing me too much credits.