Ldap contacts backend

Hello everyone. I’m trying to make it to work but I have only errors like this one :

RuntimeException: Invalid record or configuration for vcard

/var/www/nextcloud/apps/ldap_contacts_backend/lib/Service/LdapCardBackend.php - line 83:

OCA\LDAPContactsBackend\Service\LdapEntryToVcard::convert()

/var/www/nextcloud/apps/ldap_contacts_backend/lib/Service/LdapCardBackend.php - line 64:

OCA\LDAPContactsBackend\Service\LdapCardBackend->entryToCard()

/var/www/nextcloud/apps/ldap_contacts_backend/lib/Service/ContactsAddressBook.php - line 84:

OCA\LDAPContactsBackend\Service\LdapCardBackend->searchCards()

/var/www/nextcloud/lib/private/ContactsManager.php - line 51:

OCA\LDAPContactsBackend\Service\ContactsAddressBook->search()

/var/www/nextcloud/lib/private/Contacts/ContactsMenu/ContactsStore.php - line 85:

OC\ContactsManager->search()

/var/www/nextcloud/lib/private/Contacts/ContactsMenu/Manager.php - line 70:

OC\Contacts\ContactsMenu\ContactsStore->getContacts()

/var/www/nextcloud/core/Controller/ContactsMenuController.php - line 60:

OC\Contacts\ContactsMenu\Manager->getEntries()

/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 217:

OC\Core\Controller\ContactsMenuController->index()

/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php - line 126:

OC\AppFramework\Http\Dispatcher->executeController()

/var/www/nextcloud/lib/private/AppFramework/App.php - line 156:

OC\AppFramework\Http\Dispatcher->dispatch()

/var/www/nextcloud/lib/private/Route/Router.php - line 302:

OC\AppFramework\App::main()

/var/www/nextcloud/lib/base.php - line 1006:

OC\Route\Router->match()

/var/www/nextcloud/index.php - line 36:

OC::handleRequest()

my configuration is:

addressBookDisplayName: XXX
host: ldap1.xxxxxxx.pl
port: 636
agentDn: cn=xxx,dc=xxxxxxx,dc=pl
agentPassword: xxxxxxxxxxxxxxx
bases:
dc=xxxxxxx,dc=pl
searchAttributes:
uid
attributeMapping:
TEL=mobile
tEnc: ssl
filter: (objectclass=person)

Any suggests ?