Enabling the ores role results in invalid settings getting created, so when you run mwscript extensions/ORES/maintenance/PopulateDatabase.php you get a 404 from the ORES service, since no models are enabled. It looks like the format changed in this commit, so you need

$wgOresModels = [
	'damaging' => [ 'enabled' => false ],
	'goodfaith' => [ 'enabled' => false ],
	'reverted' => [ 'enabled' => false ],
	'wp10' => [ 'enabled' => true ],
	'draftquality' => [ 'enabled' => true ]
];

The role currently sets up a variable that looks like

$wgOresModels = [
	'damaging' => false,
	'goodfaith' => false,
	'reverted' => false,
	'wp10' => true,
];

I still get an error when running the PopulateDatabase script ({"error": {"code": "not found", "message": "Models ('wp10', 'draftquality') not available for testwiki"}}) but at least it's a more correct error :)