Unable to create an OpenShift Express application. When I add application details and click on 'Finnish', an error-message pop-up is shown and the following entry is created in error log.

eclipse.buildId=M20110909-1335
java.version=1.6.0_22
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US
Framework arguments: -product org.eclipse.epp.package.jee.product
Command-line arguments: -os linux -ws gtk -arch x86_64 -product org.eclipse.epp.package.jee.product

Error
Wed Feb 01 11:37:02 CET 2012
Could not create application

com.openshift.express.client.OpenShiftEndpointException: Could not configure application "myphp" at "https://ec2-184-72-129-138.compute-1.amazonaws.com/broker/cartridge"
at com.openshift.express.client.OpenShiftService.sendRequest(OpenShiftService.java:366)
at com.openshift.express.client.OpenShiftService.requestApplicationAction(OpenShiftService.java:295)
at com.openshift.express.client.OpenShiftService.createApplication(OpenShiftService.java:173)
at com.openshift.express.internal.client.InternalUser.createApplication(InternalUser.java:183)
at org.jboss.tools.openshift.express.internal.ui.wizard.CreateNewApplicationWizardModel.createApplication(CreateNewApplicationWizardModel.java:40)
at org.jboss.tools.openshift.express.internal.ui.wizard.CreateNewApplicationWizardModel.createApplication(CreateNewApplicationWizardModel.java:46)
at org.jboss.tools.openshift.express.internal.ui.wizard.CreateNewApplicationWizard$1.run(CreateNewApplicationWizard.java:95)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: com.openshift.express.internal.client.httpclient.BadRequestException:

{"exit_code":1,"broker":"1.1.1","api":"1.1.2","messages":"","broker_c":["namespace","rhlogin","ssh","app_uuid","debug","alter","cartridge","cart_type","action","app_name","api"],"result":"Invalid user","debug":"","data":"","api_c":["placeholder"]}

at com.openshift.express.internal.client.httpclient.UrlConnectionHttpClient.createException(UrlConnectionHttpClient.java:104)
at com.openshift.express.internal.client.httpclient.UrlConnectionHttpClient.post(UrlConnectionHttpClient.java:71)
at com.openshift.express.client.OpenShiftService.sendRequest(OpenShiftService.java:357)
... 7 more
Caused by: java.io.IOException: Server returned HTTP response code: 400 for URL: https://ec2-184-72-129-138.compute-1.amazonaws.com/broker/cartridge
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1403)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
at com.openshift.express.internal.client.httpclient.UrlConnectionHttpClient.post(UrlConnectionHttpClient.java:66)
... 8 more

On the server-side I can see the following entry in access log.

209.132.186.34 ip-10-72-58-120.ec2.internal - - [01/Feb/2012:05:37:01 -0500] "POST /broker/cartridge HTTP/1.1" 400 247 "-" "Java OpenShift/2.3.0 (org.jboss.tools.openshift.express.ui 2.3.0.v20120131-0401-H204-Beta1)"

I'm not using proxy. My user is a completely new user without any registered domain namespace.