If you are doing blacklisting of a large amount URLs, using the wildcard character (*) but still wish to have functionality to print, you will need to add the following URL to your URL Blacklist Exception list:
Other built-in Chrome OS URLs may need to be whitelisted for additional functionality.
Note that whitelisting chrome://* will whitelist all of the below:
To view all the available chrome:// commands, type chrome://about/ in your chrome browser URL
Additional whitelisting for logging in to applications that use Google Credentials may be necessary: