TypeError: App\Http\Controllers\ApiController::getCountries(): Return value must be of type array, null returned in file /home/chamber/public_html/folder/app/Http/Controllers/ApiController.php on line 52 #0 /home/chamber/public_html/folder/app/Http/Controllers/DocumentCaseController.php(18): App\Http\Controllers\ApiController->getCountries() #1 /home/chamber/public_html/folder/app/Http/Controllers/DocumentCaseController.php(25): App\Http\Controllers\DocumentCaseController->__construct() #2 /home/chamber/public_html/folder/app/Http/Controllers/FilesController.php(18): App\Http\Controllers\DocumentCaseController::getInstance() #3 /home/chamber/public_html/folder/app/Http/Controllers/FilesController.php(25): App\Http\Controllers\FilesController->__construct() #4 /home/chamber/public_html/folder/app/Providers/AppServiceProvider.php(30): App\Http\Controllers\FilesController::getInstance() #5 /home/chamber/public_html/folder/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(36): App\Providers\AppServiceProvider->boot() #6 /home/chamber/public_html/folder/vendor/laravel/framework/src/Illuminate/Container/Util.php(41): Illuminate\Container\BoundMethod::Illuminate\Container\{closure}() #7 /home/chamber/public_html/folder/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(93): Illuminate\Container\Util::unwrapIfClosure() #8 /home/chamber/public_html/folder/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(37): Illuminate\Container\BoundMethod::callBoundMethod() #9 /home/chamber/public_html/folder/vendor/laravel/framework/src/Illuminate/Container/Container.php(661): Illuminate\Container\BoundMethod::call() #10 /home/chamber/public_html/folder/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(929): Illuminate\Container\Container->call() #11 /home/chamber/public_html/folder/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(910): Illuminate\Foundation\Application->bootProvider() #12 [internal function]: Illuminate\Foundation\Application->Illuminate\Foundation\{closure}() #13 /home/chamber/public_html/folder/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(911): array_walk() #14 /home/chamber/public_html/folder/vendor/laravel/framework/src/Illuminate/Foundation/Bootstrap/BootProviders.php(17): Illuminate\Foundation\Application->boot() #15 /home/chamber/public_html/folder/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(242): Illuminate\Foundation\Bootstrap\BootProviders->bootstrap() #16 /home/chamber/public_html/folder/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(176): Illuminate\Foundation\Application->bootstrapWith() #17 /home/chamber/public_html/folder/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(160): Illuminate\Foundation\Http\Kernel->bootstrap() #18 /home/chamber/public_html/folder/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(134): Illuminate\Foundation\Http\Kernel->sendRequestThroughRouter() #19 /home/chamber/public_html/index.php(52): Illuminate\Foundation\Http\Kernel->handle() #20 {main}