Error when using more than php 7.4 version

[QenvingQ]

Hello, did some one had error that same like me after i upgrade from 7.4 to 8.1
I enable view the error log, and i found this 

Error: Call to undefined function WHMCS\Security\putenv() in /www/wwwroot/.../vendor/whmcs/whmcs-foundation/lib/Security/Environment.php:0
Stack trace:
#0 /www/wwwroot/.../init.php(0): WHMCS\Security\Environment::setHttpProxyHeader()
#1 /www/wwwroot/.../admin/configgeneral.php(0): unknown()
#2 {main}

When i use php 7.4 back, it's become fine and no had issue like this.
Anyone had solution?

[WHMCS SamP]

Hello,

This issue is most likely caused by the server's PHP 8.1 configuration, where putenv function is listed in the disable_functions setting. To resolve the error, you need to have your hosting provider or system administrator remove putenv from that setting.

[QenvingQ]

Hey
Thanks for helping.
But i got another problem.

I go to link blablabla.com/admin/index.php
and get this error 

Error: Call to undefined method WHMCS\License::getRegistrationDate() in /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Admin/Survey/Retently/v1/GlobalNps.php:0
Stack trace:
#0 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Admin/Survey/Retently/v1/GlobalNps.php(0): WHMCS\Admin\Survey\Retently\v1\GlobalNps->getLicenseStartDate()
#1 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Admin.php(0): WHMCS\Admin\Survey\Retently\v1\GlobalNps->generateOutput()
#2 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Admin.php(0): WHMCS\Admin->retentlyNpsSurveys()
#3 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Admin.php(0): WHMCS\Admin->output()
#4 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Admin/Controller/HomepageController.php(0): WHMCS\Admin->display()
#5 [internal function]: WHMCS\Admin\Controller\HomepageController->index()
#6 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/CallableHandler.php(26): call_user_func_array()
#7 /www/wwwroot/new.purbastore.com/vendor/middlewares/fast-route/src/FastRoute.php(96): Middlewares\Utils\CallableHandler::execute()
#8 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/HandleProcessor.php(0): Middlewares\FastRoute->process()
#9 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Strategy/AssumingMiddlewareTrait.php(0): WHMCS\Route\Middleware\HandleProcessor->_process()
#10 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Dispatcher.php(76): WHMCS\Route\Middleware\HandleProcessor->process()
#11 [internal function]: Middlewares\Utils\Dispatcher->Middlewares\Utils\{closure}()
#12 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Delegate.php(31): call_user_func()
#13 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Strategy/DelegatingMiddlewareTrait.php(0): Middlewares\Utils\Delegate->process()
#14 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Dispatcher.php(76): WHMCS\Admin\ApplicationSupport\Route\Middleware\Assent->process()
#15 [internal function]: Middlewares\Utils\Dispatcher->Middlewares\Utils\{closure}()
#16 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Delegate.php(31): call_user_func()
#17 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Strategy/DelegatingMiddlewareTrait.php(0): Middlewares\Utils\Delegate->process()
#18 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Security/Middleware/Authorization.php(0): WHMCS\Security\Middleware\Authorization->process()
#19 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/AbstractProxyMiddleware.php(0): WHMCS\Security\Middleware\Authorization->process()
#20 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Strategy/AssumingMiddlewareTrait.php(0): WHMCS\Route\Middleware\AbstractProxyMiddleware->_process()
#21 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Dispatcher.php(76): WHMCS\Route\Middleware\AbstractProxyMiddleware->process()
#22 [internal function]: Middlewares\Utils\Dispatcher->Middlewares\Utils\{closure}()
#23 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Delegate.php(31): call_user_func()
#24 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Strategy/DelegatingMiddlewareTrait.php(0): Middlewares\Utils\Delegate->process()
#25 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/AbstractProxyMiddleware.php(0): WHMCS\Admin\ApplicationSupport\Route\Middleware\Authentication->process()
#26 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Strategy/AssumingMiddlewareTrait.php(0): WHMCS\Route\Middleware\AbstractProxyMiddleware->_process()
#27 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Dispatcher.php(76): WHMCS\Route\Middleware\AbstractProxyMiddleware->process()
#28 [internal function]: Middlewares\Utils\Dispatcher->Middlewares\Utils\{closure}()
#29 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Delegate.php(31): call_user_func()
#30 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Strategy/DelegatingMiddlewareTrait.php(0): Middlewares\Utils\Delegate->process()
#31 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Dispatcher.php(76): WHMCS\Admin\ApplicationSupport\Route\Middleware\DirectoryValidation->process()
#32 [internal function]: Middlewares\Utils\Dispatcher->Middlewares\Utils\{closure}()
#33 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Delegate.php(31): call_user_func()
#34 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/BackendPsr7Response.php(0): Middlewares\Utils\Delegate->process()
#35 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/BackendPsr7Response.php(0): WHMCS\Route\Middleware\BackendPsr7Response->_process()
#36 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Dispatcher.php(76): WHMCS\Route\Middleware\BackendPsr7Response->process()
#37 [internal function]: Middlewares\Utils\Dispatcher->Middlewares\Utils\{closure}()
#38 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Delegate.php(31): call_user_func()
#39 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Dispatcher.php(56): Middlewares\Utils\Delegate->process()
#40 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/BackendDispatch.php(0): Middlewares\Utils\Dispatcher->dispatch()
#41 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Strategy/AssumingMiddlewareTrait.php(0): WHMCS\Route\Middleware\BackendDispatch->_process()
#42 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Dispatcher.php(76): WHMCS\Route\Middleware\BackendDispatch->process()
#43 [internal function]: Middlewares\Utils\Dispatcher->Middlewares\Utils\{closure}()
#44 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Delegate.php(31): call_user_func()
#45 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/RoutePathMatch.php(0): Middlewares\Utils\Delegate->process()
#46 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Strategy/AssumingMiddlewareTrait.php(0): WHMCS\Route\Middleware\RoutePathMatch->_process()
#47 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Dispatcher.php(76): WHMCS\Route\Middleware\RoutePathMatch->process()
#48 [internal function]: Middlewares\Utils\Dispatcher->Middlewares\Utils\{closure}()
#49 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Delegate.php(31): call_user_func()
#50 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/WhitelistFilter.php(0): Middlewares\Utils\Delegate->process()
#51 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Strategy/DelegatingMiddlewareTrait.php(0): WHMCS\Route\Middleware\WhitelistFilter->_process()
#52 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Dispatcher.php(76): WHMCS\Route\Middleware\WhitelistFilter->process()
#53 [internal function]: Middlewares\Utils\Dispatcher->Middlewares\Utils\{closure}()
#54 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Delegate.php(31): call_user_func()
#55 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/RoutableClientModuleRequest.php(0): Middlewares\Utils\Delegate->process()
#56 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Strategy/AssumingMiddlewareTrait.php(0): WHMCS\Route\Middleware\RoutableClientModuleRequest->_process()
#57 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Dispatcher.php(76): WHMCS\Route\Middleware\RoutableClientModuleRequest->process()
#58 [internal function]: Middlewares\Utils\Dispatcher->Middlewares\Utils\{closure}()
#59 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Delegate.php(31): call_user_func()
#60 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/RoutableAdminRequestUri.php(0): Middlewares\Utils\Delegate->process()
#61 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Strategy/AssumingMiddlewareTrait.php(0): WHMCS\Route\Middleware\RoutableAdminRequestUri->_process()
#62 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Dispatcher.php(76): WHMCS\Route\Middleware\RoutableAdminRequestUri->process()
#63 [internal function]: Middlewares\Utils\Dispatcher->Middlewares\Utils\{closure}()
#64 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Delegate.php(31): call_user_func()
#65 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/RoutableRequestUri.php(0): Middlewares\Utils\Delegate->process()
#66 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Strategy/AssumingMiddlewareTrait.php(0): WHMCS\Route\Middleware\RoutableRequestUri->_process()
#67 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Dispatcher.php(76): WHMCS\Route\Middleware\RoutableRequestUri->process()
#68 [internal function]: Middlewares\Utils\Dispatcher->Middlewares\Utils\{closure}()
#69 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Delegate.php(31): call_user_func()
#70 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/RoutableRequestQueryUri.php(0): Middlewares\Utils\Delegate->process()
#71 /www/wwwroot/new.purbastore.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Strategy/AssumingMiddlewareTrait.php(0): WHMCS\Route\Middleware\RoutableRequestQueryUri->_process()
#72 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Dispatcher.php(76): WHMCS\Route\Middleware\RoutableRequestQueryUri->process()
#73 [internal function]: Middlewares\Utils\Dispatcher->Middlewares\Utils\{closure}()
#74 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Delegate.php(31): call_user_func()
#75 /www/wwwroot/new.purbastore.com/vendor/middlewares/utils/src/Dispatcher.php(56): Middlewares\Utils\Delegate->process()
#76 /www/wwwroot/new.purbastore.com/admin/index.php(0): Middlewares\Utils\Dispatcher->dispatch()
#77 {main}

Do you know how to fix this 
Thank You