Issue changing page url
 

I had to change two of my pages URL to allow a better UI and help with finding information. The first one, I had not problems. However in attempting to switch the home page in the site builder by "editing" the page from /home to simply / I encountered an error An unexpected error was returned: '%1$s'

Any ideas why? Is there a way I can change the URL pr site destination in admincp? Currently my site has no associate home page now.