After the upgrade to the new server, analyze the old method of quickplace authentication. If you are using domcfg.nsf for form authentication, the path has changed for the login form from Quickplace/resources.nsf to LotusQuickr/resources.nsf and the target form is QuickPlaceLoginForm.
If the user directory configuration has a Type of (No Directory) and Name (No Name), this domcfg.nsf change is critical. Also if you do not have the domcfg.nsf database configured on the new server, create one. Below is a link to the technote:
If this is not changed, no Quickr place user authentication will take place since domino will be trying to authenticate using: