First of all: Good to hear that you could not find any issues.
Yesterday, I had this problem with the SSL. I asked a friend to check the site (I deactivated coming soon mode for 10 mins) and he encountered the same issues.
Then I installed the SSL plugin.
This morning I had the same issues.
But to be honest: Since afternoon (couple of hours ago) I constantly checked the website and there are no issues.
It seems that it is working now. Maybe the SSL Plugin really took half a day to start working or so… I have no idea ??