Domino 8.5 - WebSphere Portal

I have installed Domino 8.5 Gold, WebSphere Portal 6.1 and also the necessary addons to the portal server to work with Domino. After this, i have configured the Lotus Notes client to acces the portal server. I can access the list of Portal Applications and templates but when i open an existing application ( or after having created one ), i got this message inside the portlet container

CWPPV0006E: URL not defined for the portletviewer view 5_RGCKNKG108U1802FRVHM911094, check extension contribution

Any idea ?

Thanks.

Subject: Request additional information - Portal Server configuration

Could you please provide more details on your Portal Server configuration? What version is it? What did you install on it? Did you install NCI? Which version is it?

How did you create applications on server? Did you create on server or did you create it through Portal Application catalog?