In zentyal.log, I got this:
EBox::Loggerd::_parseLog('EBox::Loggerd=HASH(0x56511995c1e0)', '/var/log/syslog') called at /usr/share/perl5/EBox/Loggerd.pm line 172
EBox::Loggerd::_mainloop('EBox::Loggerd=HASH(0x56511995c1e0)') called at /usr/share/perl5/EBox/Loggerd.pm line 67
EBox::Loggerd::run('EBox::Loggerd=HASH(0x56511995c1e0)') called at /usr/share/zentyal/loggerd line 10
2019/08/14 11:13:52 WARN> Loggerd.pm:154 EBox::Loggerd::_parseLog - Error processing line Aug 14 11:13:47 osrv-ad dhcpd[5754]: DHCPACK on 192.168.2.53 to c8:ff:28:09:60:f5 (PORT-INT01) via eth0 of /var/log/syslog:
2019/08/14 11:28:52 DEBUG> Select.pm:363 EBox::Types::Select::_paramIsValid - Valeur invalide pour Console d'identification par défaut: /bin/bash.
Choisissez une valeur dans la valeur définie: /usr/bin/dash, /usr/bin/rbash, /usr/bin/screen, /usr/bin/tmux, /usr/bin/bash, /usr/bin/sh at Valeur invalide pour Console d'identification par défaut: /bin/bash.
Choisissez une valeur dans la valeur définie: /usr/bin/dash, /usr/bin/rbash, /usr/bin/screen, /usr/bin/tmux, /usr/bin/bash, /usr/bin/sh at /usr/share/perl5/EBox/Types/Select.pm line 363
EBox::Types::Select::_paramIsValid('EBox::Types::Select=HASH(0x56511fdeba68)', 'HASH(0x56511fde8348)') called at /usr/share/perl5/EBox/Types/Abstract.pm line 457
EBox::Types::Abstract::setMemValue('EBox::Types::Select=HASH(0x56511fdeba68)', 'HASH(0x56511fde8348)') called at /usr/share/perl5/EBox/Types/Select.pm line 423
EBox::Types::Select::_setValue('EBox::Types::Select=HASH(0x56511fdeba68)', '/bin/bash') called at /usr/share/perl5/EBox/Types/Abstract.pm line 62
EBox::Types::Abstract::new('EBox::Types::Select', 'defaultValue', '/bin/bash', 'help', 'Cela sera appliquer uniquement pour les nouveaux utilisateurs M-` partir de maintenant.', 'disableCache', 1, 'printableName', 'Console d'identification par dM-ifaut', 'HTMLViewer', '/ajax/viewer/selectViewer.mas', 'editable', 1, 'fieldName', 'login_shell', 'HTMLSetter', '/ajax/setter/selectSetter.mas', 'populate', 'CODE(0x56511fd81ef0)', 'type', 'select') called at /usr/share/perl5/EBox/Types/Basic.pm line 32
EBox::Types::Basic::new('EBox::Types::Select', 'defaultValue', '/bin/bash', 'help', 'Cela sera appliquer uniquement pour les nouveaux utilisateurs M-` partir de maintenant.', 'disableCache', 1, 'printableName', 'Console d'identification par dM-ifaut', 'HTMLViewer', '/ajax/viewer/selectViewer.mas', 'editable', 1, 'fieldName', 'login_shell', 'HTMLSetter', '/ajax/setter/selectSetter.mas', 'populate', 'CODE(0x56511fd81ef0)', 'type', 'select') called at /usr/share/perl5/EBox/Types/Select.pm line 68
EBox::Types::Select::new('EBox::Types::Select', 'fieldName', 'login_shell', 'printableName', 'Console d'identification par dM-ifaut', 'disableCache', 1, 'populate', 'CODE(0x56511fd81ef0)', 'editable', 1, 'defaultValue', '/bin/bash', 'help', 'Cela sera appliquer uniquement pour les nouveaux utilisateurs M-` partir de maintenant.') called at /usr/share/perl5/EBox/Samba/Model/PAM.pm line 111
EBox::Samba::Model::PAM::_table('EBox::Samba::Model::PAM=HASH(0x56511fd7b758)') called at /usr/share/perl5/EBox/Model/DataTable.pm line 104
EBox::Model::DataTable::_setupTable('EBox::Samba::Model::PAM=HASH(0x56511fd7b758)') called at /usr/share/perl5/EBox/Model/DataTable.pm line 92
EBox::Model::DataTable::table('EBox::Samba::Model::PAM=HASH(0x56511fd7b758)') called at /usr/share/perl5/EBox/Model/DataForm.pm line 718
EBox::Model::DataForm::_defaultRow('EBox::Samba::Model::PAM=HASH(0x56511fd7b758)') called at /usr/share/perl5/EBox/Model/DataForm.pm line 198
EBox::Model::DataForm::row('EBox::Samba::Model::PAM=HASH(0x56511fd7b758)') called at /usr/share/perl5/EBox/Model/DataForm.pm line 650
EBox::Model::DataForm::AUTOLOAD('EBox::Samba::Model::PAM=HASH(0x56511fd7b758)') called at /usr/share/perl5/EBox/Samba.pm line 251
EBox::Samba::actions('EBox::Samba=HASH(0x56511e8d64e8)') called at /usr/share/perl5/EBox/Module/Service.pm line 290
EBox::Module::Service::configured('EBox::Samba=HASH(0x56511e8d64e8)') called at /usr/share/perl5/EBox/Logs.pm line 253
EBox::Logs::getLogsModules('EBox::Logs=HASH(0x56511dbbc7d0)') called at /usr/share/perl5/EBox/Logs.pm line 276
EBox::Logs::getAllTables('EBox::Logs=HASH(0x56511dbbc7d0)') called at /usr/share/perl5/EBox/Logs.pm line 305
EBox::Logs::getTableInfo('EBox::Logs=HASH(0x56511dbbc7d0)', 'leases') called at /usr/share/perl5/EBox/MyDBEngine.pm line 310
EBox::MyDBEngine::insert('EBox::MyDBEngine=HASH(0x56511dc3f868)', 'leases', 'HASH(0x56511fd8fa08)') called at /usr/share/perl5/EBox/DHCPLogHelper.pm line 91
EBox::DHCPLogHelper::processLine('EBox::DHCPLogHelper=HASH(0x56511fbbc0f0)', '/var/log/syslog', 'Aug 14 11:28:47 osrv-ad dhcpd[5754]: DHCPACK on 192.168.2.53 to c8:ff:28:09:60:f5 (PORT-INT01) via eth0', 'EBox::MyDBEngine=HASH(0x56511dc3f868)') called at /usr/share/perl5/EBox/Loggerd.pm line 152
eval {...} at /usr/share/perl5/EBox/Loggerd.pm line 151
EBox::Loggerd::_parseLog('EBox::Loggerd=HASH(0x56511995c1e0)', '/var/log/syslog') called at /usr/share/perl5/EBox/Loggerd.pm line 172
EBox::Loggerd::_mainloop('EBox::Loggerd=HASH(0x56511995c1e0)') called at /usr/share/perl5/EBox/Loggerd.pm line 67
EBox::Loggerd::run('EBox::Loggerd=HASH(0x56511995c1e0)') called at /usr/share/zentyal/loggerd line 10
2019/08/14 11:28:52 WARN> Loggerd.pm:154 EBox::Loggerd::_parseLog - Error processing line Aug 14 11:28:47 osrv-ad dhcpd[5754]: DHCPACK on 192.168.2.53 to c8:ff:28:09:60:f5 (PORT-INT01) via eth0 of /var/log/syslog:
2019/08/14 11:32:25 DEBUG> Select.pm:363 EBox::Types::Select::_paramIsValid - Valeur invalide pour Console d'identification par défaut: /bin/bash.
2019/08/14 11:32:25 ERROR> Base.pm:364 EBox::CGI::Base::run - no value sent for required parameter 'modules'