"Application error" after logging into Admin Console

Hello all,

I'm trying to get started with a new install of Kaltura CE 4.0 on Ubuntu 10.4.2. Installation has all gone successfully, but when I try to log into the admin console, I get a white screen with only the two messages "An error occurred" and "Application error".

I've looked through a lot of similar posts and can't find anyone who has exactly this problem, though there are several similar ones reported. They key line in the logs below appears to be:

"Problem with http://drupal.lse.ac.uk/api_v3/index.php?service=user&action=loginByLogi... [1], in /var/opt/kaltura/app/admin_console/lib/Kaltura/KalturaClientBase.php:340"

Can anyone advise as to what might cause this?

Thanks

Steve

Relevant logs:

==kaltura_apache_access.log==

158.143.57.174 - - [06/Jun/2011:15:54:58 +0100] "GET /admin_console/index.php/partner/create HTTP/1.1" 200 1252 "http://drupal.lse.ac.uk/start/" "Mozilla/5.0 (Windows NT 5.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1"
127.0.0.1 - - [06/Jun/2011:15:55:05 +0100] "POST /api_v3/index.php?service=user&action=loginByLoginId HTTP/1.0" 500 - "-" "-"
158.143.57.174 - - [06/Jun/2011:15:55:05 +0100] "POST /admin_console/index.php/user/login HTTP/1.1" 500 274 "http://drupal.lse.ac.uk/admin_console/index.php/partner/create" "Mozilla/5.0 (Windows NT 5.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1"

==admin_console.log==

2011-06-06 15:54:58 [1619301485] [Bootstrap->_initLog] DEBUG: starting request
2011-06-06 15:54:59 [1619301485] [Bootstrap->__destruct] DEBUG: boostrap destructed, application run for 0.195905923843 seconds
2011-06-06 15:55:05 [7631527] [Bootstrap->_initLog] DEBUG: starting request
2011-06-06 15:55:05 [7631527] [Kaltura_ClientLoggingProxy->log] DEBUG: service url: [http://drupal.lse.ac.uk [2]]
2011-06-06 15:55:05 [7631527] [ErrorController->handleApplicationException] ERR: exception 'KalturaClientException' with message 'Problem with http://drupal.lse.ac.uk/api_v3/index.php?service=user&action=loginByLogi... [1], ' in /var/opt/kaltura/app/admin_console/lib/Kaltura/KalturaClientBase.php:340
Stack trace:
#0 /var/opt/kaltura/app/admin_console/lib/Kaltura/KalturaClientBase.php(262): KalturaClientBase->doPostRequest('http://drupal.l...', Array, Array)
#1 /var/opt/kaltura/app/admin_console/lib/Kaltura/KalturaClientBase.php(195): KalturaClientBase->doHttpRequest('http://drupal.l...', Array, Array)
#2 /var/opt/kaltura/app/admin_console/lib/Kaltura/KalturaClient.php(1844): KalturaClientBase->doQueue()
#3 /var/opt/kaltura/app/admin_console/lib/Kaltura/AuthAdapter.php(42): KalturaUserService->loginByLoginId('clt-support@lse...', 'k4ltur4', '-2')
#4 /var/opt/kaltura/app/vendor/ZendFramework/library/Zend/Auth.php(117): Kaltura_AuthAdapter->authenticate()
#5 /var/opt/kaltura/app/admin_console/controllers/UserController.php(97): Zend_Auth->authenticate(Object(Kaltura_AuthAdapter))
#6 /var/opt/kaltura/app/vendor/ZendFramework/library/Zend/Controller/Action.php(513): UserController->loginAction()
#7 /var/opt/kaltura/app/vendor/ZendFramework/library/Zend/Controller/Dispatcher/Standard.php(289): Zend_Controller_Action->dispatch('loginAction')
#8 /var/opt/kaltura/app/vendor/ZendFramework/library/Zend/Controller/Front.php(946): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#9 /var/opt/kaltura/app/vendor/ZendFramework/library/Zend/Application/Bootstrap/Bootstrap.php(77): Zend_Controller_Front->dispatch()
#10 /var/opt/kaltura/app/vendor/ZendFramework/library/Zend/Application.php(358): Zend_Application_Bootstrap_Bootstrap->run()
#11 /var/opt/kaltura/app/admin_console/web/index.php(26): Zend_Application->run()
#12 {main}
2011-06-06 15:55:05 [7631527] [Bootstrap->__destruct] DEBUG: boostrap destructed, application run for 0.23341012001 seconds

==kaltura_apache_errors.log==
Nothing

==kaltura_api_v3.log==
Nothing