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In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version: 19.0.1 - 19.0.1.1
Operating system and version: Linux 5.4.51-v7l+ #1327 SMP Thu Jul 23 11:04:39 BST 2020 armv7l
Apache or nginx version : nginx/1.18.0 (fpm-fcgi)
PHP version: 7.4.8
Modules loaded: Core, date, libxml, openssl, pcre, zlib, filter, hash, Reflection, SPL, session, standard, sodium, cgi-fcgi, mysqlnd, PDO, xml, apcu, bcmath, bz2, calendar, ctype, curl, dom, mbstring, FFI, fileinfo, ftp, gd, gettext, gmp, iconv, igbinary, imagick, intl, json, ldap, exif, mysqli, pdo_mysql, Phar, posix, readline, redis, shmop, SimpleXML, sockets, sysvmsg, sysvsem, sysvshm, tokenizer, xmlreader, xmlwriter, xsl, zip, Zend OPcache
The issue you are facing:
Problem with deleting files and folders
Is this the first time you’ve seen this error? (Y/N): N
Steps to replicate it:
- delete file in groupfolder or in normal folder
- get status error deleting “file/folder”
The output of your Nextcloud log in Admin > Logging:
{"reqId":"G4OZXksiR6VUA2mSqsCO","level":4,"time":"2020-08-05T13:50:46+02:00","remoteAddr":"1**.***.***.***","user":"***Username***","app":"webdav","method":"DELETE","url":"/remote.php/dav/files/***Username***/**folderstructure**/*filename*","message":{"Exception":"Exception","Message":"Failed to move groupfolder item to trash","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/files_trashbin/lib/Trash/TrashManager.php","line":103,"function":"moveToTrash","class":"OCA\\GroupFolders\\Trash\\TrashBackend","type":"->"},{"file":"/var/www/nextcloud/apps/files_trashbin/lib/Storage.php","line":192,"function":"moveToTrash","class":"OCA\\Files_Trashbin\\Trash\\TrashManager","type":"->"},{"file":"/var/www/nextcloud/apps/files_trashbin/lib/Storage.php","line":99,"function":"doDelete","class":"OCA\\Files_Trashbin\\Storage","type":"->"},{"file":"/var/www/nextcloud/apps/files_accesscontrol/lib/StorageWrapper.php","line":287,"function":"unlink","class":"OCA\\Files_Trashbin\\Storage","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/View.php","line":1161,"function":"unlink","class":"OCA\\FilesAccessControl\\StorageWrapper","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/View.php","line":718,"function":"basicOperation","class":"OC\\Files\\View","type":"->"},{"file":"/var/www/nextcloud/apps/dav/lib/Connector/Sabre/File.php","line":455,"function":"unlink","class":"OC\\Files\\View","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Tree.php","line":183,"function":"delete","class":"OCA\\DAV\\Connector\\Sabre\\File","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":295,"function":"delete","class":"Sabre\\DAV\\Tree","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpDelete","class":"Sabre\\DAV\\CorePlugin","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":474,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":251,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":319,"function":"start","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/apps/dav/lib/Server.php","line":320,"function":"exec","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/apps/dav/appinfo/v2/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/remote.php","line":167,"args":["/var/www/nextcloud/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/var/www/nextcloud/apps/groupfolders/lib/Trash/TrashBackend.php","Line":183,"CustomMessage":"--"},"userAgent":"Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Firefox/78.0","version":"19.0.1.1","id":"5f2a9d35d8e6c"}
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
{
"instanceid": "***REMOVED SENSITIVE VALUE***",
"passwordsalt": "***REMOVED SENSITIVE VALUE***",
"secret": "***REMOVED SENSITIVE VALUE***",
"trusted_domains": [
"***REMOVED SENSITIVE VALUE***",
"***REMOVED SENSITIVE VALUE***",
"localhost",
"***REMOVED SENSITIVE VALUE***"
],
"datadirectory": "***REMOVED SENSITIVE VALUE***",
"dbtype": "mysql",
"version": "19.0.1.1",
"overwritehost": "***REMOVED SENSITIVE VALUE***",
"overwriteprotocol": "https",
"overwritewebroot": "\/",
"overwrite.cli.url": "***REMOVED SENSITIVE VALUE***",
"dbname": "***REMOVED SENSITIVE VALUE***",
"dbhost": "***REMOVED SENSITIVE VALUE***",
"dbport": "",
"dbtableprefix": "oc_",
"mysql.utf8mb4": true,
"dbuser": "***REMOVED SENSITIVE VALUE***",
"dbpassword": "***REMOVED SENSITIVE VALUE***",
"installed": true,
"activity_expire_days": 14,
"auth.bruteforce.protection.enabled": true,
"blacklisted_files": [
".htaccess",
"Thumbs.db",
"thumbs.db"
],
"cron_log": true,
"enable_previews": true,
"enabledPreviewProviders": [
"OC\\Preview\\PNG",
"OC\\Preview\\JPEG",
"OC\\Preview\\GIF",
"OC\\Preview\\BMP",
"OC\\Preview\\XBitmap",
"OC\\Preview\\Movie",
"OC\\Preview\\PDF",
"OC\\Preview\\MP3",
"OC\\Preview\\TXT",
"OC\\Preview\\MarkDown"
],
"filesystem_check_changes": 0,
"filelocking.enabled": "true",
"htaccess.RewriteBase": "\/",
"integrity.check.disabled": false,
"knowledgebaseenabled": false,
"logfile": "***REMOVED SENSITIVE VALUE***",
"loglevel": 2,
"logtimezone": "***REMOVED SENSITIVE VALUE***",
"log_rotate_size": 104857600,
"maintenance": false,
"memcache.local": "\\OC\\Memcache\\APCu",
"memcache.locking": "\\OC\\Memcache\\Redis",
"preview_max_x": 1024,
"preview_max_y": 768,
"preview_max_scale_factor": 1,
"redis": {
"host": "***REMOVED SENSITIVE VALUE***",
"port": 0,
"timeout": 0
},
"quota_include_external_storage": false,
"share_folder": "\/Shares",
"skeletondirectory": "",
"theme": "",
"trashbin_retention_obligation": "auto, 7",
"updater.release.channel": "stable",
"trusted_proxies": "***REMOVED SENSITIVE VALUE***",
"app_install_overwrite": [
"joplin"
],
"twofactor_enforced": "true",
"twofactor_enforced_groups": [],
"twofactor_enforced_excluded_groups": []
}
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE