You are using PhpStorm 2018.1.x with Xdebug 2.7.
Either upgrade PhpStorm to the latest stable 2018.3.x or downgrade Xdebug to 2.6.x
The problem is in recently changed XML namespace in Xdebug protocol, as of Xdebug 2.7 (https
instead of http
). It’s fixed/supported since PhpStorm 2018.3 (see WI-43622).