restart your computer and, if updates are still available, retry updating.
And I restarted again, and same result.
next, reset the cc app:
to reset the cc desktop app, make sure it's in the foreground, then press:
Win: Ctrl + Alt + R
Mac: Cmd + Opt + R
if that fails, try to repair
if that fails go ahead and uninstall/reinstall per the above link
if that fails, do a clean cc install following each applicable step:
uninstall every cc app including preferences, https://helpx.adobe.com/creative-cloud/help/uninstall-remove-app.html
then uninstall the cc desktop app, https://helpx.adobe.com/creative-cloud/help/uninstall-creative-cloud-desktop-app.html
clean your computer of cc files per http://www.adobe.com/support/contact/cscleanertool.html
check for, and if available, update your os
restart your computer (don't skip this)
reinstall the cc desktop app, https://helpx.adobe.com/uk/download-install/kb/creative-cloud-desktop-app-download.html
if you're unable to install the cc desktop app at this stage, use the link at the bottom of the page at https://helpx.adobe.com/uk/download-install/kb/creative-cloud-desktop-app-download.html
use the desktop app to install your cc programs/trials
great, and yes, that's a lot easier than the nuclear (last) option.