I followed advice and ran /scripts/upcp
Important Notice: Incompatible versions of /scripts and /usr/local/cpanel
All servers running Release, Current, or Edge should ensure that their cPanel installation is up to date. /scripts from the 10.6 series are not compatible with older builds. Running /scripts/upcp will bring your cpanel installation into sync with your /scripts. This issue is addressed in the current builds, but until cPanel is updated you will not be able to remove zones from DNS if you have updated your /scripts.
Now WebHost Manager displays this error:
Invalid Hostname. (This account is currently not available.). Hostnames may not contains spaces or tabs.
Any advice what to do?