Hi @Sumaleth,
Is your URL http://localhost/ ?
If the answer is yes, you'll need to change that because isn't a qualified domain (you can use somehting like magento.localhost or 127.0.0.1 but not localhost)
Hi. No, the domain we're using is this:
http://testing.installatron.com/magento53455346626/
http://testing.installatron.com/magento53455346626/index.php/hgjdb3zo
After the upgrade these URLs now reload to that strange http://localhost/.. location.
'localhost' is the name of the MySQL server address, but we don't use it anywhere else.
More details:
I found that the "localhost" value is coming from this file:
./vendor/zendframework/zend-uri/src/Uri.php
Specifically, this function in that file:
public function getHost() { return $this->host; }
I'm going to keep looking at it.