So, did a little research. -505 is a permissions error in Google Play. Most of the people who have run into it either had something go wrong with an OS upgrade where they had previously had the app in question installed on the old OS and it didn't delete itself properly when uninstalled, or the developer got lazy and didn't differentiate permissions properly between the two apps and it is trying to install a permission that is already there.
Alternatively, if you have installed this on a guest account on your phone and then uninstalled it from the main account, the guest account settings probably didn't get deleted - uninstall it from the guest account if that is the case.