OpenShift Express: Unable to verify user credentials with a user doesn't have registered domain

When I try to log on with a user which doesn't have a register domain namespace, the verification fails and the wizard returns the following error-message:

Could not check user credentials: Could not unmarshall response "{"api_c":["placeholder"],"result":"","exit_code":0,"api":"1.1.3","data":{"user_info":{"domains":[],"max_gears":5,"vip":false,"ssh_keys":{},"uuid":"ab2cae3fb9f2462a83f83cfa26f1fb64","rhlogin":"anagy+2012032703@redhat.com","consumed_gears":0,"ssh_type":"","rhc_domain":"dev.rhcloud.com","ssh_key":""},"app_info":{}},"broker_c":["namespace","rhlogin","ssh","app_uuid","debug","alter","cartridge","cart_type","action","app_name","api"],"messages":"","debug":""}".