Views are not accessible anymore

Views are not accessible anymore

Some of my views are not accessible anymore.
- In edit mode, I receive a ServletException in:/jsp/edit/view/viewedit.jsp] null
- In script mode, nothing display
- Users can't display the view

I was playing in the Layout (switch between Pane Layout to Tab Layout and revert back). All the views I touch are not working anymore.

http://creator.zoho.com/slack/requetes/view/16/
http://creator.zoho.com/slack/requetes/view/23/
http://creator.zoho.com/slack/requetes/view/12/
http://creator.zoho.com/slack/requetes/view/18/

I don't wish to loose their configurations, could you please take a look (share is already done for support).
thanks