In the developer dashboard I have a "Homepage "URL" already listed for my already published extension. Then today I noticed that the "Official URL" was "None"... so I clicked on the word None and a dropdown list of sites appeared including the same site I have as my extension's Homepage URL (oddly with a forwardslash at the end)... anyway, I selected that URL and clicked "Save draft". I then noticed the words appear "Why can't I submit?". When I click those words a popup appears with "The official website was not valid" but no clue as to why it was not valid.
My website is up and working (with https) and I have verified ownership
of it (checked with google search console). So where do I go from here?
Thanks in advance for any suggestions.