roudcube upgrade fails

Unattended-upgrades of Debian12 Bookworm fails while processing roundcube. The following error is reported:

Code:

INFO: Running /usr/share/roundcube/bin/update.sh as user 'www-data'
PHP Parse error:  syntax error, unexpected '|', expecting ';' or '{' in /usr/share/roundcube/program/lib/Roundcube/rcube_utils.php on line 431
Fatal error: Please check the Roundcube error log and/or server error logs for more information.

Any insights on how to correct this ?

 

What shows command

Code:

apt policy roundcube

What is in line 431 of that file /usr/share/roundcube/program/lib/Roundcube/rcube_utils.php ? Show two or three lines before and after that line.
What is in /var/log/dpkg.log and unatted-upgrades log?