I get a message saying that the destination for this operation is missing. Everything was fine until I downloaded the upgrade. Also get another message when quitting LR. 'Catalogue size is more that 4GB Please use a 3rd party etc etc. Am frustrated a s all was ok before the download!
Please take a loom at this article Unable to back up the catalog in Lightroom CC and let us know if you are able to solve the second issue.
For the first issue related to printing, we need to know the printer you are using and the version of Lightroom in use.Generally this problem is solved by updating/reinstalling the printer drivers.