Slim-Http error

2

That’s because Slim-Psr7 does not implement that method anymore. You’ll need to use the Slim-Http decorators on top of Slim-Psr7.

Also, don’t use $app to add routes within a group. You need to use the RouteCollectorProxy like so:

$app->group(function (RouteCollectorProxy $group) {
    $group->get(...);
});