Backup authorization error

Hi,
I have an Influxdb (v2.6.1) installation, along with grafana, to exploit data pushed by Domoticz home automation. This has been working fine for more than 12 months now.
I need to transfer this to a new machine and I thought I could use the backup/restore scenario to transfer the data.
However, like many others, I can’t get the backup to work - error 401 read authorizations not authorized. This is strange as the token I use allows me to list authorizations via the cli and api and apparently all read/write authorizations are ticked, except “write:all orgs”.
I only have 1 organization and 1 user. This user is the one created at the initial setup and the token I use is from this user.
In other messages I see mention of an Admin token but I don’t see a user Admin anywhere. And solutions suggested don’t help in my case.
So where to go from here?

Hello @Redswan,
can you try to create a new all access token and try again?
Does it still fail then?

Hello,
Thanks for your reply.
I already tried this, it still fails. The new all access token has the same rights as the initial setup token, i.e. All except “write:all orgs”.