Sabre\DAV\Exception\BadRequest: Document is empty on line 1, column 1

Hi Team
After updating 12.0.4 NC on ubuntu 16.04 i am getting this fatal error on my NC Server.These are my error logs…

Fatal	webdav	Sabre\DAV\Exception\BadRequest: Document is empty on line 1, column 1
  1. [internal function] Sabre\DAV\CorePlugin->httpPropFind(Object(Sabre\HTTP\Request), Object(Sabre\HTTP\Response))
  2. /var/www/html/nextcloud/3rdparty/sabre/event/lib/EventEmitterTrait.php - line 105: call_user_func_array(Array, Array)
  3. /var/www/html/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php - line 479: Sabre\Event\EventEmitter->emit(‘method PROPFIND’, Array)
  4. /var/www/html/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php - line 254: Sabre\DAV\Server->invokeMethod(Object(Sabre\HTTP\Request), Object(Sabre\HTTP\Response))
  5. /var/www/html/nextcloud/apps/dav/appinfo/v1/webdav.php - line 76: Sabre\DAV\Server->exec()
  6. /var/www/html/nextcloud/remote.php - line 162: require_once(’/var/www/html/n…’)
  7. {main}

Thanks in advance for your help…