Whoops\Exception\ErrorException thrown with message "Object of class DoctrineProxies\__CG__\Concrete\Core\Entity\Attribute\Set could not be converted to string"

Stacktrace:
#31 Whoops\Exception\ErrorException in /home/kusanagi/excloud/DocumentRoot/concrete/src/Attribute/SetFactory.php:58
#30 array_unique in /home/kusanagi/excloud/DocumentRoot/concrete/src/Attribute/SetFactory.php:58
#29 Concrete\Core\Attribute\SetFactory:getByAttributeKey in /home/kusanagi/excloud/DocumentRoot/concrete/src/Support/Facade/Facade.php:118
#28 Concrete\Core\Support\Facade\Facade:__callStatic in /home/kusanagi/excloud/DocumentRoot/concrete/src/Entity/Attribute/Key/Key.php:281
#27 Concrete\Core\Entity\Attribute\Key\Key:getAttributeSets in /home/kusanagi/excloud/DocumentRoot/concrete/elements/attribute/key/form.php:25
#26 include in /home/kusanagi/excloud/DocumentRoot/concrete/src/View/AbstractView.php:167
#25 Concrete\Core\View\AbstractView:renderViewContents in /home/kusanagi/excloud/DocumentRoot/concrete/src/View/AbstractView.php:151
#24 Concrete\Core\View\AbstractView:render in /home/kusanagi/excloud/DocumentRoot/concrete/src/Controller/ElementController.php:42
#23 Concrete\Core\Controller\ElementController:render in /home/kusanagi/excloud/DocumentRoot/concrete/single_pages/dashboard/pages/attributes.php:4
#22 include in /home/kusanagi/excloud/DocumentRoot/concrete/src/View/View.php:207
#21 Concrete\Core\View\View:renderViewContents in /home/kusanagi/excloud/DocumentRoot/concrete/src/View/AbstractView.php:151
#20 Concrete\Core\View\AbstractView:render in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/ResponseFactory.php:153
#19 Concrete\Core\Http\ResponseFactory:view in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/ResponseFactory.php:216
#18 Concrete\Core\Http\ResponseFactory:controller in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/ResponseFactory.php:372
#17 Concrete\Core\Http\ResponseFactory:collection in /home/kusanagi/excloud/DocumentRoot/concrete/src/Routing/DispatcherRouteCallback.php:41
#16 Concrete\Core\Routing\DispatcherRouteCallback:execute in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/DefaultDispatcher.php:115
#15 Concrete\Core\Http\DefaultDispatcher:handleDispatch in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/DefaultDispatcher.php:53
#14 Concrete\Core\Http\DefaultDispatcher:dispatch in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/Middleware/DispatcherDelegate.php:39
#13 Concrete\Core\Http\Middleware\DispatcherDelegate:next in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/Middleware/ThumbnailMiddleware.php:61
#12 Concrete\Core\Http\Middleware\ThumbnailMiddleware:process in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/Middleware/MiddlewareDelegate.php:38
#11 Concrete\Core\Http\Middleware\MiddlewareDelegate:next in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/Middleware/FrameOptionsMiddleware.php:39
#10 Concrete\Core\Http\Middleware\FrameOptionsMiddleware:process in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/Middleware/MiddlewareDelegate.php:38
#9 Concrete\Core\Http\Middleware\MiddlewareDelegate:next in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/Middleware/CookieMiddleware.php:37
#8 Concrete\Core\Http\Middleware\CookieMiddleware:process in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/Middleware/MiddlewareDelegate.php:38
#7 Concrete\Core\Http\Middleware\MiddlewareDelegate:next in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/Middleware/ApplicationMiddleware.php:29
#6 Concrete\Core\Http\Middleware\ApplicationMiddleware:process in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/Middleware/MiddlewareDelegate.php:38
#5 Concrete\Core\Http\Middleware\MiddlewareDelegate:next in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/Middleware/MiddlewareStack.php:86
#4 Concrete\Core\Http\Middleware\MiddlewareStack:process in /home/kusanagi/excloud/DocumentRoot/concrete/src/Http/DefaultServer.php:85
#3 Concrete\Core\Http\DefaultServer:handleRequest in /home/kusanagi/excloud/DocumentRoot/concrete/src/Foundation/Runtime/Run/DefaultRunner.php:100
#2 Concrete\Core\Foundation\Runtime\Run\DefaultRunner:run in /home/kusanagi/excloud/DocumentRoot/concrete/src/Foundation/Runtime/DefaultRuntime.php:102
#1 Concrete\Core\Foundation\Runtime\DefaultRuntime:run in /home/kusanagi/excloud/DocumentRoot/concrete/dispatcher.php:39
#0 include in /home/kusanagi/excloud/DocumentRoot/index.php:3