Error after upgrade

[Paulvz]

After upgrade my whmcs is broken

 

with this error in error log file.

 

[WHMCS Application] ERROR: Error: Call to undefined function WHMCS\\scoalesce() in /var/www/html/vendor/whmcs/whmcs-foundation/lib/Application.php:0 Stack trace: #0 /var/www/html/vendor/whmcs/whmcs-foundation/lib/Application.php(0): WHMCS\\Application->getRequestPath('/admin/licensee...', '/admin/licensee...') #1 /var/www/html/vendor/whmcs/whmcs-foundation/lib/Application.php(0): WHMCS\\Application->isApiRequest() #2 /var/www/html/vendor/whmcs/whmcs-foundation/lib/Application.php(0): WHMCS\\Application->shouldRedirectForIPBan() #3 /var/www/html/vendor/whmcs/whmcs-foundation/lib/Application/ApplicationServiceProvider.php(0): WHMCS\\Application->__construct(Object(WHMCS\\Config\\Application), Object(WHMCS\\Database)) #4 /var/www/html/vendor/illuminate/container/Container.php(801): WHMCS\\Application\\ApplicationServiceProvider->WHMCS\\Application\\{closure}(Object(WHMCS\\Container), Array) #5 /var/www/html/vendor/illuminate/container/Container.php(687): Illuminate\\Container\\Container->build(Object(Closure)) #6 /var/www/html/vendor/illuminate/container/Container.php(633): Illuminate\\Container\\Container->resolve('app', Array) #7 /var/www/html/vendor/illuminate/container/Container.php(1278): Illuminate\\Container\\Container->make('app') #8 /var/www/html/vendor/illuminate/support/Facades/Facade.php(198): Illuminate\\Container\\Container->offsetGet('app') #9 /var/www/html/vendor/illuminate/support/Facades/Facade.php(166): Illuminate\\Support\\Facades\\Facade::resolveFacadeInstance('app') #10 /var/www/html/vendor/whmcs/whmcs-foundation/lib/Application/Support/Facades/Facade.php(0): Illuminate\\Support\\Facades\\Facade::getFacadeRoot() #11 /var/www/html/init.php(0): WHMCS\\Application\\Support\\Facades\\Facade::self() #12 /var/www/html/admin/licenseerror.php(0): unknown() #13 {main} {"exception":"[object] (Error(code: 0): Call to undefined function WHMCS\\\\scoalesce() at /var/www/html/vendor/whmcs/whmcs-foundation/lib/Application.php:0)"} []