Turn off or disable XeDebug/XDebug
I'm working locally, so using Wampserver. Open up your php.ini file and add this to the bottom:
xdebug.default_enable = 0
xdebug.remote_enable = 0
xdebug.profiler_enable = 0
xdebug.remote_autostart = 0
Then restart the server. Hat-tip.