Some adjustments were made on the server after which cpanel sent the mail below:
The following RPMs are found to be altered from their original install state:
dovecot,2.2.9,2.cp1140,/usr/libexec/dovecot/auth
exim,4.82,2.cp1136,/usr/sbin/exim_dbmbuild
exim,4.82,2.cp1136,/usr/sbin/exim_dumpdb
exim,4.82,2.cp1136,/usr/sbin/exim_fixdb
exim,4.82,2.cp1136,/usr/sbin/exim_lock
exim,4.82,2.cp1136,/usr/sbin/exim_tidydb
After this, all errors vanished and the template displayed very well.
Thanks very much for your help.