Guys, make sure your configs are set to the url scheme you are accessing your sites with.

if your sites are HTTPS, open your config.ini.php file and search for "http:" to replace that with "https:"

Ive seen many times that just because an .htaccess is set to forward visitors from http to https, the site admin belives that is the inly step they need to take during the http -> https updates.

Completely configure your website to use what you are telling it to use. There is no way around this. They are different protocols. Switching between protocols means switching between connections.

If you fail to do this, browsers with strict security protections could/will fail to pass along data from one page to the next.