Dolphin - KDE NC client download files but not upload files

Hi
I have 2 NC servers for different jobs. I synch 2 different folders, one for each server.

One of the server (personal) synchs 2ways (upload-download), so when I create a file locally, it shows in the server and vice versa.

The other (business) does not upload a new local file, but if I upload it thru the web page, the file synchs with the local copy.

In the business local copy I noticed the following an internal db file not updated (see Jan 30 date)

-rw-r--r--  1 olivier olivier  3276800 jan 30 22:34  .sync_69628da154f0.db
-rw-r--r--  1 olivier olivier    32768 jan 31 08:30  .sync_69628da154f0.db-shm
-rw-r--r--  1 olivier olivier  1182472 jan 31 08:30  .sync_69628da154f0.db-wal
olivier@olivier-ntbk:~/Documentos/TDFCloud$ lsof .sync_69628da154f0.db
COMMAND    PID    USER   FD   TYPE DEVICE SIZE/OFF    NODE NAME
nextcloud 4405 olivier   25uw  REG    8,5  3276800 7866826 .sync_69628da154f0.db

while the personal local copy has it updated:

-rw-r--r--  1 olivier olivier 7385088 jan 31 07:45  .sync_f3692fc2461e.db
-rw-r--r--  1 olivier olivier   32768 jan 31 07:57  .sync_f3692fc2461e.db-shm
-rw-r--r--  1 olivier olivier 4128272 jan 31 07:57  .sync_f3692fc2461e.db-wal
olivier@olivier-ntbk:~/Documentos/nuvedx$ lsof .sync_f3692fc2461e.db
COMMAND    PID    USER   FD   TYPE DEVICE SIZE/OFF    NODE NAME
nextcloud 4405 olivier   29uw  REG    8,5  7385088 2624706 .sync_f3692fc2461e.db

So both run the same Nextcloud process in my desktop.

When I touch the file to synch upload, the business-NC client starts but does nothing:

#=#=#=# Syncrun finished 2023-01-31T11:28:22Z (last step: 557 msec, total: 1076 msec)
#=#=#=# Syncrun started 2023-01-31T11:29:14Z
#=#=#=#=# Propagation starts 2023-01-31T11:29:15Z (last step: 562 msec, total: 562 msec)
#=#=#=# Syncrun finished 2023-01-31T11:29:15Z (last step: 10 msec, total: 572 msec)
#=#=#=# Syncrun started 2023-01-31T11:30:03Z
#=#=#=#=# Propagation starts 2023-01-31T11:30:04Z (last step: 590 msec, total: 590 msec)
#=#=#=# Syncrun finished 2023-01-31T11:30:04Z (last step: 19 msec, total: 610 msec)

Any suggestion on how to fix or look to fix myself this issue in my installation is much appreciated.

And I must says that the synch worked in the past and silently stopped uploads. I have another computer that has KDE-Dolphin synched in the same business server that works nicely, so I discard a server issue for the moment.

Thank you in advance