Re: what does this mean - could not find namespace: AgCreativeCloudUtils. I cannot import my photos and just finished downloading an update to the software

I’m not sure what the message means but I would try signing out of the Creative Cloud desktop application and then logging-in again. Wait for the apps to refresh and if LR 5.5 is showing as available to install, click the install button again. If LR is already shown as installed try launching again.