[Lizmap] email configuration 3.4.1

[Firma 4GIS Ireneusz Wójcik]

Hello,
I  have a problem with version 3.4.1 and mail configuration.  I have 2
instance of lizmap 3.3.16 with mail config in mainconfig.ini.php:
[mailer]
webmasterEmail="xxx at xxx.com"
webmasterName="Konto"
mailerType=smtp
sendmailPath="/usr/sbin/sendmail"
smtpHost=xxxx.xxxx.xx
smtpPort=465
smtpSecure="ssl"
smtpHelo=
smtpAuth=on
smtpUsername="xxx at xxx.com"
smtpPassword="xxxxxxxx"
smtpTimeout=10
and  it  works  perfect,  now I want to test version 3.4.1. I made the
same configuration and I have message:
Error 500. A technical error has occured. Sorry for this trouble.
Log:
2021-01-27 19:51:26     87.207.64.197   error   2021-01-27 19:51:26     [309]   In the tag $ domain_name  in the template , character $ not allowed     /var/lacko/lib/jelix/tpl/jTplCompiler.class.php 694
Can you tell me what is wrong?
best regards
Irek