First check if cPanel update is currently running using the command,
=-=-=-
ps axfwwwu | grep cPanel\ Update
-==-=
Then you need to wait till this process is finished.
Sometimes failed cPanel update also can cause this. This error can be fixed by moving the below file,
mv /usr/local/cpanel/upgrade_in_progress.txt to /usr/local/cpanel/upgrade_in_progress_txt.bak
Access Tweak setting. The issue will be fixed.
=-=-=-
ps axfwwwu | grep cPanel\ Update
-==-=
Then you need to wait till this process is finished.
Sometimes failed cPanel update also can cause this. This error can be fixed by moving the below file,
mv /usr/local/cpanel/upgrade_in_progress.txt to /usr/local/cpanel/upgrade_in_progress_txt.bak
Access Tweak setting. The issue will be fixed.