Clearing the cache didn't work for me, but this did...!! Thanks...!!!
Stephen Cassidy wrote:
Just a quick note. I have in the past two days had this same problem also due to moving db and site. A very simple fix that worked on both of my website is to go backend to Extentions / Extention Manager choose tab Discover and tick on Gantry in the list then click install. Also click on Discover on the top right refresh button. That's it it all works again.
Stephen