In case your website has HTTPS enabled, is loading correctly on most popular browsers, but Safari is returning "Safari could not open the page because the server stopped responding", please unset or ask your hosting provider or web developer to unset "Upgrade" http header.
Usually you can disable it by adding this line in your .htaccess file:
<ifModule mod_headers.c>
Header unset Upgrade
</ifModule>If it still doesn’t work, please open a General Support Request.
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