problems with the autoloader

[Wonko52]

I cloned the project and started composer install:

Class WebThing\Value located in ./src/WebThing/Value.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Property located in ./src/WebThing/Property.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\PropertyInterface located in ./src/WebThing/PropertyInterface.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\MultipleThings located in ./src/WebThing/MultipleThings.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Thing located in ./src/WebThing/Thing.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Action located in ./src/WebThing/Action.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Server\Handlers\EventHandler located in ./src/WebThing/Server/Handlers/EventHandler.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Server\Handlers\PropertyHandler located in ./src/WebThing/Server/Handlers/PropertyHandler.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Server\Handlers\ActionHandler located in ./src/WebThing/Server/Handlers/ActionHandler.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Server\Handlers\EventsHandler located in ./src/WebThing/Server/Handlers/EventsHandler.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Server\Handlers\BaseHandler located in ./src/WebThing/Server/Handlers/BaseHandler.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Server\Handlers\ThingHandler located in ./src/WebThing/Server/Handlers/ThingHandler.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Server\Handlers\ThingsHandler located in ./src/WebThing/Server/Handlers/ThingsHandler.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Server\Handlers\ActionIDHandler located in ./src/WebThing/Server/Handlers/ActionIDHandler.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Server\Handlers\PropertiesHandler located in ./src/WebThing/Server/Handlers/PropertiesHandler.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Server\Handlers\ActionsHandler located in ./src/WebThing/Server/Handlers/ActionsHandler.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Server\Handlers\WebSocketThingHandler located in ./src/WebThing/Server/Handlers/WebSocketThingHandler.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Server\WebThingServer located in ./src/WebThing/Server/WebThingServer.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\ActionInterface located in ./src/WebThing/ActionInterface.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\ThingsInterface located in ./src/WebThing/ThingsInterface.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\EventInterface located in ./src/WebThing/EventInterface.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\SingleThing located in ./src/WebThing/SingleThing.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\ThingInterface located in ./src/WebThing/ThingInterface.php does not comply with psr-4 autoloading standard. Skipping.
Class WebThing\Event located in ./src/WebThing/Event.php does not comply with psr-4 autoloading standard. Skipping.
Class Crimson\RequestHandler located in ./vendor/malik/crimson/src/Crimson/RequestHandler.php does not comply with psr-4 autoloading standard. Skipping.
Class Crimson\HttpServer located in ./vendor/malik/crimson/src/Crimson/HttpServer.php does not comply with psr-4 autoloading standard. Skipping.
Class Crimson\App located in ./vendor/malik/crimson/src/Crimson/App.php does not comply with psr-4 autoloading standard. Skipping.

I changed in composer.json

"psr-4": {
      "WebThing\\": "src/"
    }

to

"psr-4": {
      "WebThing\\": "src/WebThing/"
    }

So it works for WebThing. For Crimson\App the problem still exists.