Fwd: Authentication is needed to run `/bin/csh' as the super user

Hello.

Sometimes I use pkexec to run thunar as root on my FreeBSD 14 (recently
upgraded from 13.2),but after the upgrade it does not work anymore :

marietto@marietto:/usr/home/marietto $ pkexec thunar

==== AUTHENTICATING FOR org.xfce.thunar ====
Authentication is required to run Thunar as root.
Authenticating as: mario (marietto)
** (process:4449): WARNING **: 13:46:43.685: Error reading line from
helper: nothing to read
==== AUTHENTICATION FAILED ====
Bus error


even pkexec only gives the same error :

marietto@marietto:/usr/home/marietto $ pkexec

==== AUTHENTICATING FOR org.freedesktop.policykit.exec
==== Authentication is needed to run `/bin/csh' as the super user
Authenticating as: mario (marietto)
** (process:4300): WARNING **: 12:54:52.939: Error reading line from
helper: nothing to read
==== AUTHENTICATION FAILED ====
Bus error


Any idea about how to fix it ? I started a post here :

https://forums.freebsd.org/threads/authentication-is-needed-to-run-bin-csh-as-the-super-user.91302/

but we haven't been able to get rid of the problem.

-- 
Mario.