Hi, welcome to the XWiki forum!
Maybe you could provide a screenshot of a page where you get this so that we can try to help you find out what part of xwiki is generating this error?
More generally this error means that there’s a {{velocity}}
macro used somewhere in a wiki page and that page was last saved y a user not having the scripting right. To fix this you just need to resave that page with a user having scripting rights. However, I agree it’s not easy to locate which page is being referred (something we should improve).
If you don’t have any {{velocity}}
macro in your pages then this error is probably not coming from the page rendering but maybe from the skin rendering. A screenshot would help.
Thanks