Owncloud client for SLES 12?

This is no bug report, just a question:

I would like to sync a directory on a SLES 12.4 server with our ownCloud server running on OS15.2.

Is there a OC client for SLES 12 that can do this? I get an error that the client I installed would not be compatible with the server version, but there is no other client available.

Client version: 2.2.4-9.1
Server version: 10.5.0

This is the logfile extract (replace XXXX with https):

12-09 14:49:40:042 0x9ec410 Resetting QNAM
12-09 14:49:40:051 0x9ec410 Checking server and authentication
12-09 14:49:40:054 0x9ec410 Trying to look up system proxy
12-09 14:49:40:057 0xe25db0 virtual void OCC::SystemProxyRunnable::run() Starting system proxy lookup
12-09 14:49:40:079 0x9ec410 No system proxy set by OS
12-09 14:49:40:083 0x9ec410 Object::connect: No such signal QNetworkReplyImpl::encrypted()
12-09 14:49:40:086 0x9ec410 !!! OCC::CheckServerJob created for “XXXX://insel1.insel.de/owncloud” + “status.php” “OCC::ConnectionValidator”
12-09 14:49:40:290 0x9ec410 status.php returns: QMap((“edition”, QVariant(QString, “Community”) ) ( “installed” , QVariant(bool, true) ) ( “maintenance” , QVariant(bool, false) ) ( “needsDbUpgrade” , QVariant(bool, false) ) ( “productname” , QVariant(QString, “ownCloud | DrB”) ) ( “version” , QVariant(QString, “10.5.0.10”) ) ( “versionstring” , QVariant(QString, “10.5.0”) ) ) 0 Reply: QNetworkReplyImpl(0x13f3970)
12-09 14:49:40:293 0x9ec410 ** Application: ownCloud found: QUrl( “XXXX://insel1.insel.de/owncloud/status.php” ) with version “10.5.0” ( “10.5.0.10” )
12-09 14:49:40:297 0x9ec410 # Check whether authenticated propfind works.
12-09 14:49:40:300 0x9ec410 !!! OCC::PropfindJob created for “XXXX://insel1.insel.de/owncloud” + “/” “OCC::ConnectionValidator”
12-09 14:49:40:908 0x9ec410 void OCC::AbstractNetworkJob::slotFinished() 202 “Error downloading XXXX://insel1.insel.de/owncloud/remote.php/webdav/ - server replied: Forbidden” QVariant(int, 403)
12-09 14:49:40:911 0x9ec410 PROPFIND request not successful, http result code is 403 “”
12-09 14:49:40:915 0x9ec410 “Keine Verbindung zu ownCloud auf XXXX://insel1.insel.de/owncloud
Error downloading XXXX://insel1.insel.de/owncloud/remote.php/webdav/ - server replied: Forbidden (Unsupported client version.)”
12-09 14:49:40:919 0x9ec410 Account “ze@insel1.insel.de” disconnected or paused, terminating or descheduling sync folders

Maybe someone can hint me what to do.

Thank you,
Stefan Brunthaler