Windows Client - "Access Denied" error and Files deleted on the server

I’m facing an issue on the windows desktop client:

I have a separate drive called E:\ where I put all my sync folders.
A few days ago, the client stopped syncing my “Work” folder with the error “Access Denied”, but the local permissions of the “Work” folder are inherited from E:\ just as the other folders, which continued working normally so far.

I did not notice the issue until I logged in the server via web browser and saw that all the files inside the “Work” folder were gone and the folder was empty on the server side, but not on the Windows PC.

As an attempt to solve the problem, I deleted the sync for that folder inside the windows client and recreated it in an attempt to sync the files back to the server, but I continue the get the same error.

I´m not worried about the files because they are in the PC and I have them on a backup drive, although I´m surprised that this could happend due to an error on the client side.
The problem is that I cannot get this specific folder to sync again with the server…

OS version: Windows 10 Pro 20H2
Client version: 3.3.4 (Stable channel)
Server version: 21.0.1

Logfiles - Client Side

Work_sync.log
(“Carol Trabaho” and “Henrique Trabalho” are the folders.)
(“Acesso negado” means Access Denied)

#=#=#=# Syncrun finished 2021-09-17T02:29:40Z (last step: 118 msec, total: 6439 msec)
#=#=#=# Syncrun started 2021-09-17T02:30:38Z
#=#=#=#=# Propagation starts 2021-09-17T02:30:38Z (last step: 330 msec, total: 330 msec)
#=#=#=# Syncrun finished 2021-09-17T02:30:38Z (last step: 65 msec, total: 396 msec)
#=#=#=# Syncrun started 2021-09-17T03:01:45Z
#=#=#=#=# Propagation starts 2021-09-17T03:01:45Z (last step: 331 msec, total: 331 msec)
#=#=#=# Syncrun finished 2021-09-17T03:01:45Z (last step: 13 msec, total: 345 msec)
#=#=#=# Syncrun started 2021-09-17T12:46:46Z
#=#=#=#=# Propagation starts 2021-09-17T12:46:46Z (last step: 340 msec, total: 340 msec)
||Carol Trabalho|512|1|1631825853|6143becae4201|0|00008826ocnkd3g1fuvq|3|Acesso negado.|0|0|1631829706||
||Henrique Trabalho|512|1|1626381211|613f83dcb9682|0|00008825ocnkd3g1fuvq|3|Acesso negado.|0|0|1631552476||
#=#=#=# Syncrun finished 2021-09-17T12:48:58Z (last step: 131794 msec, total: 132135 msec)
#=#=#=# Syncrun started 2021-09-17T12:50:19Z
#=#=#=#=# Propagation starts 2021-09-17T12:50:19Z (last step: 306 msec, total: 306 msec)
||Henrique Trabalho|512|1|1626381211|613f83dcb9682|0|00008825ocnkd3g1fuvq|3|Acesso negado.|0|0|1631552476||
||Carol Trabalho|512|1|1631825853|6143becae4201|0|00008826ocnkd3g1fuvq|3|Acesso negado.|0|0|1631829706||
#=#=#=# Syncrun finished 2021-09-17T12:50:19Z (last step: 289 msec, total: 595 msec)
#=#=#=# Syncrun started 2021-09-17T12:51:03Z
#=#=#=#=# Propagation starts 2021-09-17T12:51:03Z (last step: 327 msec, total: 327 msec)
||Henrique Trabalho|512|1|1626381211|613f83dcb9682|0|00008825ocnkd3g1fuvq|3|Acesso negado.|0|0|1631552476||
||Carol Trabalho|512|1|1631825853|6143becae4201|0|00008826ocnkd3g1fuvq|3|Acesso negado.|0|0|1631829706||
#=#=#=# Syncrun finished 2021-09-17T12:51:03Z (last step: 278 msec, total: 606 msec)
#=#=#=# Syncrun started 2021-09-17T13:14:09Z
#=#=#=# Syncrun finished 2021-09-17T13:15:12Z (last step: 63684 msec, total: 63684 msec)
#=#=#=# Syncrun started 2021-09-17T13:17:18Z
#=#=#=#=# Propagation starts 2021-09-17T13:17:43Z (last step: 24637 msec, total: 24637 msec)
||Carol Trabalho|512|1|1631825853|6143becae4201|0|00008826ocnkd3g1fuvq|3|Acesso negado.|0|0|1631829706||
||Henrique Trabalho|512|1|1626381211|613f83dcb9682|0|00008825ocnkd3g1fuvq|3|Acesso negado.|0|0|1631552476||
#=#=#=# Syncrun finished 2021-09-17T13:17:51Z (last step: 7958 msec, total: 32596 msec)
#=#=#=# Syncrun started 2021-09-17T13:19:19Z
#=#=#=#=# Propagation starts 2021-09-17T13:19:20Z (last step: 1161 msec, total: 1161 msec)
||Henrique Trabalho|512|1|1626381211|613f83dcb9682|0|00008825ocnkd3g1fuvq|3|Acesso negado.|0|0|1631552476||
||Carol Trabalho|512|1|1631825853|6143becae4201|0|00008826ocnkd3g1fuvq|3|Acesso negado.|0|0|1631829706||
#=#=#=# Syncrun finished 2021-09-17T13:19:22Z (last step: 1968 msec, total: 3130 msec)
#=#=#=# Syncrun started 2021-09-17T17:21:13Z
#=#=#=#=# Propagation starts 2021-09-17T17:21:17Z (last step: 3878 msec, total: 3878 msec)
||Henrique Trabalho|512|1|1626381211|613f83dcb9682|0|00008825ocnkd3g1fuvq|3|Acesso negado.|0|0|1631552476||
||Carol Trabalho|512|1|1631825853|6143becae4201|0|00008826ocnkd3g1fuvq|3|Acesso negado.|0|0|1631829706||
#=#=#=# Syncrun finished 2021-09-17T17:21:18Z (last step: 675 msec, total: 4554 msec)
#=#=#=# Syncrun started 2021-09-17T17:26:19Z
#=#=#=#=# Propagation starts 2021-09-17T17:26:20Z (last step: 265 msec, total: 265 msec)
||Henrique Trabalho|512|1|1626381211|613f83dcb9682|0|00008825ocnkd3g1fuvq|3|Acesso negado.|0|0|1631552476||
||Carol Trabalho|512|1|1631825853|6143becae4201|0|00008826ocnkd3g1fuvq|3|Acesso negado.|0|0|1631829706||
#=#=#=# Syncrun finished 2021-09-17T17:26:20Z (last step: 696 msec, total: 961 msec)

owncloud.log.0

2021-09-25 13:40:18:966 [ debug nextcloud.gui.socketapi ]	[ OCC::SocketListener::sendMessage ]:	Sending SocketAPI message --> "REGISTER_PATH:E:\\Nextcloud\\Arquivos Pessoais" to QLocalSocket(0x1f28b6f8a10)
2021-09-25 13:40:18:966 [ info nextcloud.gui.socketapi ]:	Trying to send SocketAPI Register Path Message --> "REGISTER_PATH:E:\\Nextcloud\\Joplin" to QLocalSocket(0x1f28b6f8a10)
2021-09-25 13:40:18:966 [ debug nextcloud.gui.socketapi ]	[ OCC::SocketListener::sendMessage ]:	Sending SocketAPI message --> "REGISTER_PATH:E:\\Nextcloud\\Joplin" to QLocalSocket(0x1f28b6f8a10)
2021-09-25 13:40:18:966 [ info nextcloud.gui.socketapi ]:	Trying to send SocketAPI Register Path Message --> "REGISTER_PATH:E:\\Nextcloud\\Recepção" to QLocalSocket(0x1f28b6f8a10)
2021-09-25 13:40:18:966 [ debug nextcloud.gui.socketapi ]	[ OCC::SocketListener::sendMessage ]:	Sending SocketAPI message --> "REGISTER_PATH:E:\\Nextcloud\\Recepção" to QLocalSocket(0x1f28b6f8a10)
2021-09-25 13:40:18:981 [ info nextcloud.gui.socketapi ]:	Received SocketAPI message <-- "GET_STRINGS:CONTEXT_MENU_TITLE" from QLocalSocket(0x1f28b6f8a10)
2021-09-25 13:40:18:981 [ debug nextcloud.gui.socketapi ]	[ OCC::SocketListener::sendMessage ]:	Sending SocketAPI message --> "GET_STRINGS:BEGIN" to QLocalSocket(0x1f28b6f8a10)
2021-09-25 13:40:18:981 [ debug nextcloud.gui.socketapi ]	[ OCC::SocketListener::sendMessage ]:	Sending SocketAPI message --> "STRING:CONTEXT_MENU_TITLE:Nextcloud" to QLocalSocket(0x1f28b6f8a10)
2021-09-25 13:40:18:981 [ debug nextcloud.gui.socketapi ]	[ OCC::SocketListener::sendMessage ]:	Sending SocketAPI message --> "GET_STRINGS:END" to QLocalSocket(0x1f28b6f8a10)
2021-09-25 13:40:18:981 [ info nextcloud.gui.socketapi ]:	Received SocketAPI message <-- "GET_MENU_ITEMS:E:\\Nextcloud\\Arquivos Trabalho\\Carol Trabalho" from QLocalSocket(0x1f28b6f8a10)
2021-09-25 13:40:18:981 [ debug nextcloud.gui.socketapi ]	[ OCC::SocketListener::sendMessage ]:	Sending SocketAPI message --> "GET_MENU_ITEMS:BEGIN" to QLocalSocket(0x1f28b6f8a10)
2021-09-25 13:40:18:981 [ debug nextcloud.gui.socketapi ]	[ OCC::SocketListener::sendMessage ]:	Sending SocketAPI message --> "GET_MENU_ITEMS:END" to QLocalSocket(0x1f28b6f8a10)
2021-09-25 13:40:19:035 [ info nextcloud.gui.socketapi ]:	Lost connection  QLocalSocket(0x1f28b6f8a10)
2021-09-25 13:40:19:584 [ debug nextcloud.gui.account.state ]	[ OCC::AccountState::checkConnectivity ]:	"Henrique@domain.com" The last ETag check succeeded within the last  30 s ( 17 s). No connection check needed!
2021-09-25 13:40:31:363 [ info nextcloud.gui.folder.manager ]:	Etag poll timer timeout
2021-09-25 13:40:31:363 [ info nextcloud.gui.folder.manager ]:	Folders to sync: 5
2021-09-25 13:40:31:363 [ info nextcloud.gui.folder.manager ]:	Number of folders that don't use push notifications: 5
2021-09-25 13:40:31:363 [ info nextcloud.gui.folder.manager ]:	Run etag job on folder OCC::Folder(0x1f2853fe650)
2021-09-25 13:40:31:363 [ info nextcloud.gui.folder.manager ]:	Run etag job on folder OCC::Folder(0x1f285534a00)
2021-09-25 13:40:31:363 [ info nextcloud.gui.folder.manager ]:	Run etag job on folder OCC::Folder(0x1f287e50c30)
2021-09-25 13:40:31:363 [ info nextcloud.gui.folder.manager ]:	Run etag job on folder OCC::Folder(0x1f287e57c50)
2021-09-25 13:40:31:363 [ info nextcloud.gui.folder.manager ]:	Can not run etag job: Polltime not reached
2021-09-25 13:40:31:363 [ info nextcloud.gui.folder.manager ]:	Run etag job on folder OCC::Folder(0x1f288168a70)

logfile on the server side

Part extracted from nextcloud.log

{"reqId":"dYD0evEJABmUoif6aYCr","level":1,"time":"September 17, 2021 13:21:46","remoteAddr":"192.168.0.143","user":"Henrique","app":"no app in context","method":"PROPFIND","url":"/remote.php/webdav/","message":"Deprecated event type for {\"[object] (OCP\\SabrePluginEvent)\":{\"*statusCode\":200,\"*message\":\"\",\"*server\":{\"[object] (OCA\\DAV\\Connector\\Sabre\\Server)\":{\"tree\":\"[object] (OCA\\DAV\\Connector\\Sabre\\ObjectTree)\",\"*baseUri\":\"/remote.php/webdav/\",\"httpResponse\":\"[object] (Sabre\\HTTP\\Response)\",\"httpRequest\":\"[object] (Sabre\\HTTP\\Request)\",\"sapi\":\"[object] (Sabre\\HTTP\\Sapi)\",\"*plugins\":[],\"transactionType\":null,\"protectedProperties\":{\"...\":\"Over 20 items, aborting normalization\"},\"debugExceptions\":false,\"resourceTypeMapping\":[],\"enablePropfindDepthInfinity\":true,\"xml\":\"[object] (Sabre\\DAV\\Xml\\Service)\",\"*logger\":null,\"*listeners\":{\"...\":\"Over 20 items, aborting normalization\"},\"*wildcardListeners\":[],\"*listenerIndex\":[]}},\"Symfony\\Contracts\\EventDispatcher\\EventpropagationStopped\":false}}: null","userAgent":"Mozilla/5.0 (Android) Nextcloud-android/3.17.0","version":"21.0.1.1"}
{"reqId":"kML8v23jmmbCOBpjpCHp","level":1,"time":"September 17, 2021 13:21:47","remoteAddr":"192.168.0.143","user":"Henrique","app":"no app in context","method":"PROPFIND","url":"/remote.php/webdav/Arquivos%20Pessoais/","message":"Deprecated event type for {\"[object] (OCP\\SabrePluginEvent)\":{\"*statusCode\":200,\"*message\":\"\",\"*server\":{\"[object] (OCA\\DAV\\Connector\\Sabre\\Server)\":{\"tree\":\"[object] (OCA\\DAV\\Connector\\Sabre\\ObjectTree)\",\"*baseUri\":\"/remote.php/webdav/\",\"httpResponse\":\"[object] (Sabre\\HTTP\\Response)\",\"httpRequest\":\"[object] (Sabre\\HTTP\\Request)\",\"sapi\":\"[object] (Sabre\\HTTP\\Sapi)\",\"*plugins\":[],\"transactionType\":null,\"protectedProperties\":{\"...\":\"Over 20 items, aborting normalization\"},\"debugExceptions\":false,\"resourceTypeMapping\":[],\"enablePropfindDepthInfinity\":true,\"xml\":\"[object] (Sabre\\DAV\\Xml\\Service)\",\"*logger\":null,\"*listeners\":{\"...\":\"Over 20 items, aborting normalization\"},\"*wildcardListeners\":[],\"*listenerIndex\":[]}},\"Symfony\\Contracts\\EventDispatcher\\EventpropagationStopped\":false}}: null","userAgent":"Mozilla/5.0 (Android) Nextcloud-android/3.17.0","version":"21.0.1.1"}
{"reqId":"b1exCjyDkkpfxq7CIfcQ","level":1,"time":"September 17, 2021 13:21:47","remoteAddr":"192.168.0.143","user":"Henrique","app":"no app in context","method":"PROPFIND","url":"/remote.php/webdav/Arquivos%20Trabalho/","message":"Deprecated event type for {\"[object] (OCP\\SabrePluginEvent)\":{\"*statusCode\":200,\"*message\":\"\",\"*server\":{\"[object] (OCA\\DAV\\Connector\\Sabre\\Server)\":{\"tree\":\"[object] (OCA\\DAV\\Connector\\Sabre\\ObjectTree)\",\"*baseUri\":\"/remote.php/webdav/\",\"httpResponse\":\"[object] (Sabre\\HTTP\\Response)\",\"httpRequest\":\"[object] (Sabre\\HTTP\\Request)\",\"sapi\":\"[object] (Sabre\\HTTP\\Sapi)\",\"*plugins\":[],\"transactionType\":null,\"protectedProperties\":{\"...\":\"Over 20 items, aborting normalization\"},\"debugExceptions\":false,\"resourceTypeMapping\":[],\"enablePropfindDepthInfinity\":true,\"xml\":\"[object] (Sabre\\DAV\\Xml\\Service)\",\"*logger\":null,\"*listeners\":{\"...\":\"Over 20 items, aborting normalization\"},\"*wildcardListeners\":[],\"*listenerIndex\":[]}},\"Symfony\\Contracts\\EventDispatcher\\EventpropagationStopped\":false}}: null","userAgent":"Mozilla/5.0 (Android) Nextcloud-android/3.17.0","version":"21.0.1.1"}
{"reqId":"u2eSp6RoXOIktYRr7MgG","level":1,"time":"September 17, 2021 13:21:47","remoteAddr":"192.168.0.143","user":"Henrique","app":"no app in context","method":"PROPFIND","url":"/remote.php/webdav/Arquivos%20Trabalho/Carol%20Trabalho/","message":"Deprecated event type for {\"[object] (OCP\\SabrePluginEvent)\":{\"*statusCode\":200,\"*message\":\"\",\"*server\":{\"[object] (OCA\\DAV\\Connector\\Sabre\\Server)\":{\"tree\":\"[object] (OCA\\DAV\\Connector\\Sabre\\ObjectTree)\",\"*baseUri\":\"/remote.php/webdav/\",\"httpResponse\":\"[object] (Sabre\\HTTP\\Response)\",\"httpRequest\":\"[object] (Sabre\\HTTP\\Request)\",\"sapi\":\"[object] (Sabre\\HTTP\\Sapi)\",\"*plugins\":[],\"transactionType\":null,\"protectedProperties\":{\"...\":\"Over 20 items, aborting normalization\"},\"debugExceptions\":false,\"resourceTypeMapping\":[],\"enablePropfindDepthInfinity\":true,\"xml\":\"[object] (Sabre\\DAV\\Xml\\Service)\",\"*logger\":null,\"*listeners\":{\"...\":\"Over 20 items, aborting normalization\"},\"*wildcardListeners\":[],\"*listenerIndex\":[]}},\"Symfony\\Contracts\\EventDispatcher\\EventpropagationStopped\":false}}: null","userAgent":"Mozilla/5.0 (Android) Nextcloud-android/3.17.0","version":"21.0.1.1"}

Does anyone have any suggestion?