Thanks for the information I found it in the entry “meta-box-order_page” under my usermeta.
I removed the location and its name. Now it is back to normal.
-Mark
The same thing happened to me when I updated to Connections version 10.4.11. I even tested it on my staging site and now both staging and live sites do not work.
All the links now link go to #.
-Mark
Thanks pattyok that plugin Gallery Custom Links was causing the issues for me too.
You saved me so many headaches!