After today's freshly released update, I have lost the ability to nudge. I cannot nudge individual points, cannot nudge objects with or without the shift key, cannot nudge text. I tried restarting, I tried chaging the keyboard nudge and corner increments per the Illustrator CC 2017 instructions web search on this same topic, but that doesn't help. I wish the new versions were less buggy when they come out.
Sorry to hear about this experience. Would you mind trying to reset Illustrator's preferences by following the steps shared in this article (https://helpx.adobe.com/illustrator/kb/troubleshoot-preference-issues.html) as suggested by Monika and sharing your observations? Disclaimer: Please note that resetting preferences will remove all custom settings, and Illustrator will launch with the defaults. You may take a backup of these settings from the location mentioned in the article.
If the issue persists, kindly try rebooting your computer in Safe Mode (Windows) / (macOS) and check if it helps.
Also, share the exact version of the OS installed on your computer so we can investigate this further.