Error APP installer

I Got this error in the nextcloudlog, klicking on the “APP”-Link in the menue:
“url”:"/nextcloud/settings/apps",“message”:“array_merge(): Expected parameter 2 to be an array, null given at /var/www/html/nextcloud/lib/private/Log/ExceptionSerializer.php#95”,“userAgent”:“Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0”,“version”:"17.0.0.