"Class inBackend does not exist"

"""
#0 /var/www/b16b3861-e50b-4668-b0b8-44089b3c3635/public_html/vendor/laravel/framework/src/Illuminate/Container/Container.php(779): ReflectionClass->__construct('inBackend')\n
#1 /var/www/b16b3861-e50b-4668-b0b8-44089b3c3635/public_html/vendor/laravel/framework/src/Illuminate/Container/Container.php(658): Illuminate\Container\Container->build('inBackend')\n
#2 /var/www/b16b3861-e50b-4668-b0b8-44089b3c3635/public_html/vendor/laravel/framework/src/Illuminate/Container/Container.php(609): Illuminate\Container\Container->resolve('inBackend', Array)\n
#3 /var/www/b16b3861-e50b-4668-b0b8-44089b3c3635/public_html/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(759): Illuminate\Container\Container->make('inBackend', Array)\n
#4 /var/www/b16b3861-e50b-4668-b0b8-44089b3c3635/public_html/vendor/laravel/framework/src/Illuminate/Container/Container.php(1222): Illuminate\Foundation\Application->make('inBackend')\n
#5 /var/www/b16b3861-e50b-4668-b0b8-44089b3c3635/public_html/app/Exceptions/Handler.php(88): Illuminate\Container\Container->offsetGet('inBackend')\n
#6 /var/www/b16b3861-e50b-4668-b0b8-44089b3c3635/public_html/app/Exceptions/Handler.php(58): FleetCart\Exceptions\Handler->shouldShowNotFoundPage(Object(ErrorException))\n
#7 /var/www/b16b3861-e50b-4668-b0b8-44089b3c3635/public_html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(326): FleetCart\Exceptions\Handler->render(Object(Illuminate\Http\Request), Object(ErrorException))\n
#8 /var/www/b16b3861-e50b-4668-b0b8-44089b3c3635/public_html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(120): Illuminate\Foundation\Http\Kernel->renderException(Object(Illuminate\Http\Request), Object(ErrorException))\n
#9 /var/www/b16b3861-e50b-4668-b0b8-44089b3c3635/public_html/public/index.php(62): Illuminate\Foundation\Http\Kernel->handle(Object(Illuminate\Http\Request))\n
#10 /var/www/b16b3861-e50b-4668-b0b8-44089b3c3635/public_html/server.php(21): require_once('/var/www/b16b38...')\n
#11 {main}
"""