Server INVALID_KS

What is the cause of this issue. I cannot login to /admin_console/. The log is below

Note. I cannot post URL to this topic. The url was https://hostname

2014-11-28 11:24:43 [195482826] [Kaltura_Client_ClientBase->doQueue] DEBUG: execution time for [/api_v3/index.php?service=systempartner_systempartner&action=getPackages]: [0.057017087936401]
2014-11-28 11:24:43 [195482826] [ErrorController->errorAction] ERR: exception 'Kaltura_Client_Exception' with message 'Invalid KS "MjUwYmQ0ZWE4Nzc5NzdiYzA0YWQxNWZkNmU4NWI5Mjg4OGU2ZGYxNXwtMjstMjsxNDE3MjI5MDg3OzI7MTQxNzE0MjY4Ny4xNjQ3O3RzZXZlZW5kb3JqQG9uLWFpci5tbjtkaXNhYmxlZW50aXRsZW1lbnQ7Ow==", Error "-1,INVALID_STR"' in /opt/kaltura/app/admin_console/lib/Kaltura/Client/ParseUtils.php:67
Stack trace:
#0 /opt/kaltura/app/admin_console/lib/Kaltura/Client/SystemPartner/SystemPartnerService.php(160): Kaltura_Client_ParseUtils::checkIfError(Object(SimpleXMLElement))
--
2014-11-28 11:24:44 [1734459342] [Kaltura_Client_ClientBase->doQueue] DEBUG: execution time for [/api_v3/index.php?service=systempartner_systempartner&action=getPackages]: [0.056619882583618]
2014-11-28 11:24:44 [1734459342] [ErrorController->errorAction] ERR: exception 'Kaltura_Client_Exception' with message 'Invalid KS "MjUwYmQ0ZWE4Nzc5NzdiYzA0YWQxNWZkNmU4NWI5Mjg4OGU2ZGYxNXwtMjstMjsxNDE3MjI5MDg3OzI7MTQxNzE0MjY4Ny4xNjQ3O3RzZXZlZW5kb3JqQG9uLWFpci5tbjtkaXNhYmxlZW50aXRsZW1lbnQ7Ow==", Error "-1,INVALID_STR"' in /opt/kaltura/app/admin_console/lib/Kaltura/Client/ParseUtils.php:67
Stack trace:
#0 /opt/kaltura/app/admin_console/lib/Kaltura/Client/SystemPartner/SystemPartnerService.php(160): Kaltura_Client_ParseUtils::checkIfError(Object(SimpleXMLElement))
--
==> /opt/kaltura/log/kaltura_apache_errors_ssl.log <==
[Fri Nov 28 11:24:44 2014] [error] [client 112.72.13.211] File does not exist: /opt/kaltura/app/alpha/web/opt, referer: /admin_console/index.php/partner/list

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I think you might be missing some links:
/opt/kaltura/app/alpha/web -> /opt/kaltura/web
/opt/kaltura/app/alpha/web/api_v3 -> /opt/kaltura/app/api_v3/public

But I can’t really tell can you provide more info?