red padlock appear and prevent seeing of pages

Sorry I don't understand what you ask me

I have been in the article type page

There I noticed there were parameters not on "parametres globaux" (global parameters I believe). Perhaps one day I did these changes because ... I don't remember why

So I put it back all on global parameters. I saved and noticed all articles were ok. I changed again the RoleDD article, put it back on article type, and everything is ok