Native install on PHP 8.08 install fails due to eventdispatcher incompatibility between rockettheme and symphony

[Rolf-MP]

Windows, nginx, php fastcgi.

Following the native installation instructions

composer install completes fine.

php bakery bake fails with:

PHP Fatal error:  Declaration of RocketTheme\Toolbox\Event\EventDispatcher::dispatch($eventName, ?Symfony\Component\EventDispatcher\Event $event = null) must be compatible with Symfony\Component\EventDispatcher\EventDispatcher::dispatch(obj
ect $event, ?string $eventName = null): object in <SNIP>\UserFrosting-4.6.3\app\vendor\rockettheme\toolbox\Event\src\EventDispatcher.php on line 23

Fatal error: Declaration of RocketTheme\Toolbox\Event\EventDispatcher::dispatch($eventName, ?Symfony\Component\EventDispatcher\Event $event = null) must be compatible with Symfony\Component\EventDispatcher\EventDispatcher::dispatch(object $
event, ?string $eventName = null): object in <SNIP>\UserFrosting-4.6.3\app\vendor\rockettheme\toolbox\Event\src\EventDispatcher.php on line 23

The below versiosn are installed:

symfony/event-dispatcher (v5.4.3)

rockettheme/toolbox (1.6.1)

From what I can see (no expert) the latest rockettheme compatible version of symfony/event-dispatcher is 4.3.

Tried to downgrade symfony/event-dispatcher (and dependencies) but I then end up in dependency hell.