Class "PaypalServerSdkLib\PaypalServerSdkClientBuilder" not found

[asia2tv]

I have a problem

Context:

{
  "exception": "[object] (Error(code: 0): Class \"PaypalServerSdkLib\\PaypalServerSdkClientBuilder\" not found at /home/ascom/public_html/project/app/Http/Controllers/Frontend/PayPalController.php:50)
[stacktrace]
#0 [internal function]: App\\Http\\Controllers\\Frontend\\PayPalController->__construct()
#1 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Container/Container.php(989): ReflectionClass->newInstanceArgs(Array)
#2 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Container/Container.php(819): Illuminate\\Container\\Container->build('App\\\\Http\\\\Contro...')
#3 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(1048): Illuminate\\Container\\Container->resolve('App\\\\Http\\\\Contro...', Array, true)
#4 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Container/Container.php(755): Illuminate\\Foundation\\Application->resolve('App\\\\Http\\\\Contro...', Array)
#5 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(1030): Illuminate\\Container\\Container->make('App\\\\Http\\\\Contro...', Array)
#6 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Routing/Route.php(285): Illuminate\\Foundation\\Application->make('App\\\\Http\\\\Contro...')
#7 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Routing/Route.php(1125): Illuminate\\Routing\\Route->getController()
#8 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Routing/Route.php(1054): Illuminate\\Routing\\Route->controllerMiddleware()
#9 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Routing/Router.php(820): Illuminate\\Routing\\Route->gatherMiddleware()
#10 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Routing/Router.php(802): Illuminate\\Routing\\Router->gatherRouteMiddleware(Object(Illuminate\\Routing\\Route))
#11 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Routing/Router.php(786): Illuminate\\Routing\\Router->runRouteWithinStack(Object(Illuminate\\Routing\\Route), Object(Illuminate\\Http\\Request))
#12 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Routing/Router.php(750): Illuminate\\Routing\\Router->runRoute(Object(Illuminate\\Http\\Request), Object(Illuminate\\Routing\\Route))
#13 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Routing/Router.php(739): Illuminate\\Routing\\Router->dispatchToRoute(Object(Illuminate\\Http\\Request))
#14 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(201): Illuminate\\Routing\\Router->dispatch(Object(Illuminate\\Http\\Request))
#15 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(144): Illuminate\\Foundation\\Http\\Kernel->Illuminate\\Foundation\\Http\\{closure}(Object(Illuminate\\Http\\Request))
#16 /home/ascom/public_html/project/vendor/litespeed/lscache-laravel/src/LSCacheMiddleware.php(21): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#17 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Litespeed\\LSCache\\LSCacheMiddleware->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#18 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#19 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ConvertEmptyStringsToNull.php(31): Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#20 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\\Foundation\\Http\\Middleware\\ConvertEmptyStringsToNull->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#21 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#22 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TrimStrings.php(51): Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#23 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\\Foundation\\Http\\Middleware\\TrimStrings->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#24 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Http/Middleware/ValidatePostSize.php(27): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#25 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\\Http\\Middleware\\ValidatePostSize->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#26 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/PreventRequestsDuringMaintenance.php(110): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#27 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\\Foundation\\Http\\Middleware\\PreventRequestsDuringMaintenance->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#28 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Http/Middleware/HandleCors.php(49): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#29 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\\Http\\Middleware\\HandleCors->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#30 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Http/Middleware/TrustProxies.php(58): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#31 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\\Http\\Middleware\\TrustProxies->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#32 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/InvokeDeferredCallbacks.php(22): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#33 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(183): Illuminate\\Foundation\\Http\\Middleware\\InvokeDeferredCallbacks->handle(Object(Illuminate\\Http\\Request), Object(Closure))
#34 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(119): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))
#35 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(176): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))
#36 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(145): Illuminate\\Foundation\\Http\\Kernel->sendRequestThroughRouter(Object(Illuminate\\Http\\Request))
#37 /home/ascom/public_html/project/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(1190): Illuminate\\Foundation\\Http\\Kernel->handle(Object(Illuminate\\Http\\Request))
#38 /home/ascom/public_html/index.php(17): Illuminate\\Foundation\\Application->handleRequest(Object(Illuminate\\Http\\Request))
#39 {main}
"