Urbackupclientctl browse and restore-start not working: "No file backup access tokens found. Did you run a file backup yet?"

Hello!
I’m trying to restore-start a backup via urbackupclientctl but I’m receiving the following error:
Error starting restore. No file backup access tokens found. Did you run a file backup yet?
Similar error when I’m trying to browse my backups:
No file backup access tokens found. Did you run a file backup yet?

Apparently no tokens are not being written in /usr/local/var/urbackup/tokens.
I tried to copy some files I found in /usr/local/var/urbackup/data/tokens_*.properties to /usr/local/var/urbackup/tokens, but then the error becomes:
Error getting file backups

Both the server and the client are fresh installations from yesterday.
The client appears online on the server web interface, and backups are visible.
Other urbackupclientctl commands works fine.
There are already some backup, some started by the server, others started with urbackupclientctl start.
/usr/local/var/urbackup/server_idents.txt contains my server identity and fingerprint.

urbackupclientctl status output:

{
"capability_bits": 69824,
"finished_processes": [{
"process_id": 5,
"success": true
}
],
"internet_connected": true,
"internet_status": "connected",
"last_backup_time": 1678957530,
"running_processes": [],
"servers": [{
"internet_connection": true,
"name": "<my server domain>"
}
],
"time_since_last_lan_connection": 54053093
}

/etc/default/urbackupclient:

[...]
RESTORE=disabled
INTERNET_ONLY=true