Dreamweaver 21.6 - Browser preview not working after Tahoe 26.0.1 update on Macbook Pro 16". Edit Browser List doesn't help, no browser shows up, whether I use the mouse or keyboard shortcuts.
I reset Dreamweaver preferences and settings first. So, after editing the browser list several times, the preview still does not work—neither via the menu nor via keyboard shortcuts.
I had the same issue initially and from your screenshot I clicked on Edit Browser List. I was then presented with an error saying I needed to delete all browsers from the list and then re-add them manually. As soon as I did that mine started working again. Are you able to try this with your Mac?