Nexcloud dirs listing error

Periodically there is an error when scrolling through directories through the browser. This directory is not available, but if you try several times, ignoring the error, once for 4-9 enters and the error disappears for a while, then returns again. I put the log, what could be the matter??

{“reqId”:“59wkzUGzuCW2t072u1Si”,“level”:3,“time”:“2019-11-25T16:39:01+00:00”,“remoteAddr”:“192.168.1.1”,“user”:“alexandr.i”,“app”:“remote”,“method”:“PROPFIND”,“url”:"/remote.php/dav/files/alexandr.i/\u00d0\u0090\u00d0\u00b2\u00d1%82\u00d0\u00be\u00d0%B7\u00d0%B0\u00d0\u00b3\u00d1\u0080\u00d1\u0083\u00d0%B7\u00d0\u00ba\u00d0%B0",“message”:{“Exception”:“Sabre\DAV\Exception\Forbidden”,“Message”:“Requested uri () is out of base uri (/remote.php/dav/)”,“Code”:0,“Trace”:[{“file”:"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php",“line”:549,“function”:“calculateUri”,“class”:“Sabre\DAV\Server”,“type”:"->",“args”:[""]},{“file”:"/var/www/nextcloud/apps/dav/lib/Server.php",“line”:323,“function”:“getRequestUri”,“class”:“Sabre\DAV\Server”,“type”:"->",“args”:[]},{“file”:"/var/www/nextcloud/apps/dav/lib/Server.php",“line”:149,“function”:“requestIsForSubtree”,“class”:“OCA\DAV\Server”,“type”:"->",“args”:[[“calendars”,“public-calendars”,“system-calendars”,“principals”]]},{“file”:"/var/www/nextcloud/apps/dav/appinfo/v2/remote.php",“line”:34,“function”:"__construct",“class”:“OCA\DAV\Server”,“type”:"->",“args”:[{“class”:“OC\AppFramework\Http\Request”},"/remote.php/dav/"]},{“file”:"/var/www/nextcloud/remote.php",“line”:163,“args”:["/var/www/nextcloud/apps/dav/appinfo/v2/remote.php"],“function”:“require_once”}],“File”:"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php",“Line”:588,“CustomMessage”:"–"},“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:70.0) Gecko/20100101 Firefox/70.0”,“version”:“17.0.1.1”}