class '\Fisharebest\Webtrees\Module\ClippingsCart' not found

[Gustine]

Trying to build a clipping cart with latest built :
#0 unknown:unknown ErrorException("uksort() expects parameter 2 to be a valid callback, class '\Fisharebest\Webtrees\Module\ClippingsCart' not found") #1 /app/Module/ClippingsCart/ClippingsCartController.php:158 uksort([array], '\Fisharebest\Webtrees\Module\C…') #2 /app/Module/ClippingsCartModule.php:62 __construct() #3 /module.php:27 modAction('index')