Admin part works, clients part gives error 500

[Michael van]

Hi, 

I have setup WHMCS  but the client part is not working. It gives error 500, and with debugging I get :

Fatal error: Uncaught Error: Call to undefined method WHMCS\License::getBanner() in /var/www/clients/client1/web1/web/members/vendor/whmcs/whmcs-foundation/lib/ClientArea.php:0 Stack trace: #0 /var/www/clients/client1/web1/web/members/vendor/whmcs/whmcs-foundation/lib/ClientArea.php(0): WHMCS\ClientArea->getLicenseBannerMessage() #1 /var/www/clients/client1/web1/web/members/vendor/whmcs/whmcs-foundation/lib/ClientArea.php(0): WHMCS\ClientArea->getLicenseBannerHtml() #2 /var/www/clients/client1/web1/web/members/vendor/whmcs/whmcs-foundation/lib/ClientArea.php(0): WHMCS\ClientArea->outputWithoutExit() #3 /var/www/clients/client1/web1/web/members/vendor/whmcs/whmcs-foundation/lib/Http/Message/AbstractViewableResponse.php(0): WHMCS\ClientArea->getOutputContent() #4 /var/www/clients/client1/web1/web/members/vendor/middlewares/utils/src/CallableHandler.php(39): WHMCS\Http\Message\AbstractViewableResponse->getBody() #5 /var/www/clients/client1/web1/web/members/vendor/middlewares/fast-route/src/FastRoute.php(96): Middlewares\Util in /var/www/clients/client1/web1/web/members/vendor/whmcs/whmcs-foundation/lib/ClientArea.php on line 0

[twhiting9275]

Any custom addons, hooks, or modules? I'd try disabling those first

Did you upgrade from a previous version?