Error 24

Sign out of your account... Uninstall... run the Cleaner...

-https://helpx.adobe.com/x-productkb/policy-pricing/activate-deactivate-products.html

-http://helpx.adobe.com/creative-cloud/help/install-apps.html (and uninstall)

-using the cleaner after uninstalling and before reinstalling is often needed

-https://helpx.adobe.com/creative-cloud/kb/cc-cleaner-tool-installation-problems.html

-Restart your computer... Sign in to your account... Reinstall