Cbrestore fails to transfer data - Debian

I am trying to restore a dump with cbrestore on Debian 10.
cbrestore runs without error messages, but does not transfer any data.

Blockquote
sh cbrestore ./dump http://127.0.0.1:8091 -u admin -p ***** --bucket-source=test_bucket --bucket-destination=test_bucket

The Terminal says:

Blockquote
bucket: test_bucket, msgs transferred…
byte : 0 total 0 last 0.0 per sec
done

The problem occurs on debian 10 with couchbase versions 6.0.0, 6.0.1, 6.0.3 (Enterprise). The exactly same command runs without problems on windows 10 with couchbase version 6.0.1 (Enterprise)- with the same dump.