Soap error?

Hi there. I get the following error on my contao installation suddently:

Code:

Fatal error: Uncaught exception SoapFault with message looks like we got no XML document thrown in /var/www/www.scantron.dk/www/system/modules/rep_client/RepositoryBackendModule.php on line 217 #0 [internal function]: SoapClient->__call('getExtensionLis...', Array) #1 /var/www/www.scantron.dk/www/system/modules/rep_client/RepositoryBackendModule.php(217): SoapClient->getExtensionList(Array) #2 /var/www/www.scantron.dk/www/system/modules/rep_client/RepositoryCatalog.php(143): RepositoryBackendModule->getExtensionList(Array) #3 /var/www/www.scantron.dk/www/system/modules/rep_client/RepositoryBackendModule.php(151): RepositoryCatalog->listExtensions('') #4 /var/www/www.scantron.dk/www/system/modules/backend/BackendModule.php(116): RepositoryBackendModule->compile() #5 /var/www/www.scantron.dk/www/system/modules/rep_client/RepositoryBackendModule.php(88): BackendModule->generate() #6 /var/www/www.scantron.dk/www/system/modules/rep_client/RepositoryCatalog.php(61): RepositoryBackendModule->generate() #7 /var/www/www.scantron.dk/www/system/modules/backend/Backend.php(186): RepositoryCatalog->generate() #8 /var/www/www.scantron.dk/www/contao/main.php(101): Backend->getBackendModule('repository_cata...') #9 /var/www/www.scantron.dk/www/contao/main.php(304): Main->run() #10 {main}

Do you guys know how to correct this error? I don't know how it has happened... :S

Thanks in advance.
Andreas