Topics created by oakdaleftl

@sgunhouse Right you both are! 🙂 Thanks for the help.

@oakdaleftl (and others....)
USERNAME/Library/Application Support/com.operasoftware.Opera/Sessions is the folder that holds the data, one file for each workspace.
I simply restored them from TimeMachine backup. (Select all and click Restore.)
Hope this helps someone else! 🙂

@leocg An interesting update: I'd found the cert and marked it trustworthy... That was my solution!
But -being curious- I went back and reverted to system default; and still had no problems with the site.

Having learned a bit about the lock icon in the address bar (from another thread in your forums...) I discovered that the site now had a new valid cert!
(Of course, I'd notified the site's owner...)
Wish I'd been quick enough to "see" the change... 🙂

Again, thanks.

p.s.,
I have a Windows 10 machine available: Something else for me to check. Such fun! 🖖