This way can fix all Domain at once.
/scripts/upcp --force
/scripts/initfpsuexec
find /home -name "service.pwd" -exec chmod -v 600 {} ';'
/scripts/updatefrontpage
If the above does not work, try the slow way. This can fix the problem. One Domain by one Domain
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chmod 600 /home/username/public_html/_vti_pvt/service.pwd
chattr +i /home/username/public_html/_vti_pvt/service.pwd
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