Cannot open extension manager

[mcfly_liu]

Hi all,

i am a beginner of Contao,
when i try to open extension manager, below error message pop-up.
Could you please guide me how to solve it?
My Contao version is 2.9.5

Warning: SoapClient::SoapClient(http://www.contao.org/services/repository.wsdl) [soapclient.soapclient]: failed to open stream: Unable to find the socket transport "ssl" - did you forget to enable it when you configured PHP? in /webHome/LFWZ011520/www/system/modules/rep_client/RepositoryBackendModule.php on line 139
#0 [internal function]: __error(2, 'SoapClient::Soa...', '/webHome/LFWZ01...', 139, Array)
#1 /webHome/LFWZ011520/www/system/modules/rep_client/RepositoryBackendModule.php(139): SoapClient->SoapClient('http://www.cont...', Array)
#2 /webHome/LFWZ011520/www/system/modules/backend/BackendModule.php(116): RepositoryBackendModule->compile()
#3 /webHome/LFWZ011520/www/system/modules/rep_client/RepositoryBackendModule.php(88): BackendModule->generate()
#4 /webHome/LFWZ011520/www/system/modules/rep_client/RepositoryManager.php(71): RepositoryBackendModule->generate()
#5 /webHome/LFWZ011520/www/system/modules/backend/Backend.php(186): RepositoryManager->generate()
#6 /webHome/LFWZ011520/www/contao/main.php(101): Backend->getBackendModule('repository_mana...')
#7 /webHome/LFWZ011520/www/contao/main.php(304): Main->run()
#8 {main}

Warning: SoapClient::SoapClient() [soapclient.soapclient]: I/O warning : failed to load external entity "http://www.contao.org/services/repository.wsdl" in /webHome/LFWZ011520/www/system/modules/rep_client/RepositoryBackendModule.php on line 139
#0 [internal function]: __error(2, 'SoapClient::Soa...', '/webHome/LFWZ01...', 139, Array)
#1 /webHome/LFWZ011520/www/system/modules/rep_client/RepositoryBackendModule.php(139): SoapClient->SoapClient('http://www.cont...', Array)
#2 /webHome/LFWZ011520/www/system/modules/backend/BackendModule.php(116): RepositoryBackendModule->compile()
#3 /webHome/LFWZ011520/www/system/modules/rep_client/RepositoryBackendModule.php(88): BackendModule->generate()
#4 /webHome/LFWZ011520/www/system/modules/rep_client/RepositoryManager.php(71): RepositoryBackendModule->generate()
#5 /webHome/LFWZ011520/www/system/modules/backend/Backend.php(186): RepositoryManager->generate()
#6 /webHome/LFWZ011520/www/contao/main.php(101): Backend->getBackendModule('repository_mana...')
#7 /webHome/LFWZ011520/www/contao/main.php(304): Main->run()
#8 {main}

Fatal error: Uncaught exception SoapFault with message SOAP-ERROR: Parsing WSDL: Couldn't load from 'http://www.contao.org/services/repository.wsdl' : failed to load external entity "http://www.contao.org/services/repository.wsdl" thrown in /webHome/LFWZ011520/www/system/modules/rep_client/RepositoryBackendModule.php on line 139
#0 /webHome/LFWZ011520/www/system/modules/rep_client/RepositoryBackendModule.php(139): SoapClient->SoapClient('http://www.cont...', Array)
#1 /webHome/LFWZ011520/www/system/modules/backend/BackendModule.php(116): RepositoryBackendModule->compile()
#2 /webHome/LFWZ011520/www/system/modules/rep_client/RepositoryBackendModule.php(88): BackendModule->generate()
#3 /webHome/LFWZ011520/www/system/modules/rep_client/RepositoryMa

[Spooky]

Check your server environment with the Contao Check and make sure the open_ssl Extension is enabled for PHP.

[Andreas]

In BE try to set the URL to https://contao.org/services/repository.wsdl

Also run the Contao-Check Tool on your server.