framework: ErrorException: Illegal offset type in isset or empty in new version

• Laravel Version: v7.16.0
• PHP Version: PHP 7.4.7
• Database Driver & Version: Homestead, mariadb

Description:

After updating to v7.16.0 I am getting these errors (was working in v7.15.0). On CLI and on the web version.

ErrorException: Illegal offset type in isset or empty

/test/vendor/laravel/framework/src/Illuminate/Container/Container.php:1159
/test/vendor/laravel/framework/src/Illuminate/Foundation/Application.php:779
/test/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php:415
/test/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php:396
/test/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php:226
/test/vendor/laravel/framework/src/Illuminate/Database/Connection.php:835
/test/vendor/laravel/framework/src/Illuminate/Database/Connection.php:689
/test/vendor/laravel/framework/src/Illuminate/Database/Connection.php:642
/test/vendor/laravel/framework/src/Illuminate/Database/Connection.php:339
/test/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php:2203
/test/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php:2191
/test/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php:2686
/test/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php:2192
/test/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Builder.php:539
/test/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Builder.php:523
/test/app/Models/Category.php:233
/test/vendor/laravel/framework/src/Illuminate/Cache/Repository.php:383
/test/vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:383
/test/vendor/laravel/framework/src/Illuminate/Support/Facades/Facade.php:261
/test/app/Models/Category.php:235
/test/app/Providers/ComposerServiceProvider.php:24
/test/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:33
/test/vendor/laravel/framework/src/Illuminate/Container/Util.php:37
/test/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:91
/test/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php:35
/test/vendor/laravel/framework/src/Illuminate/Container/Container.php:592
/test/vendor/laravel/framework/src/Illuminate/Foundation/Application.php:867
/test/vendor/laravel/framework/src/Illuminate/Foundation/Application.php:850
/test/vendor/laravel/framework/src/Illuminate/Foundation/Application.php:851
/test/vendor/laravel/framework/src/Illuminate/Foundation/Bootstrap/BootProviders.php:17
/test/vendor/laravel/framework/src/Illuminate/Foundation/Application.php:230
/test/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php:310
/test/tests/CreatesApplication.php:18
/test/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php:102
/test/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestCase.php:81

Steps To Reproduce:

Update an existing Laravel v7.15.0 to v7.16.0