caused by: org.alfresco.repo.security.permissions.AccessDeniedException: Access Denied. You do not have the appropriate permissions to perform this operation.
caused by: net.sf.acegisecurity.AccessDeniedException: Access is denied.
I did some more testing. I am able to reproduce the jsf error messages when I first bring up the url in the browser. To fix them, I use the logout button on the error page. I then get a good logon screen and then I'm able to signin. Something is not right but I don't know where to go from here. Any ideas? Could this have anything to do with the browser configuration and/or cookies?
You should be able to move the guest space to wherever you want, as long as all the permissions still allow the guest user to access that space. You may have moved the space to point where the guest user can not get access to, which is what causes the errors at startup.