Error adding NetBackup 9.0.0.1 master

Hi Xorux-Team!

I tried to add our netbackup master running on RHEL 8 with netbackup version 9.0.0.1.

I receive following error during save and test:

API host network connection: TCP connection to fqdn:1556 is OK.
Crontab test: OK


API authorization: NOK

ERROR: ERROR: Login to API https://fqdn:1556/netbackup/login failed :/home/lpar2rrd/stor2rrd/bin/netbackup_apitest.pl:106
ERROR: {"errorCode":8961,"errorMessage":"An invalid API request is encountered.","attributeErrors":{"password":"may not be empty"},"fileUploadErrors":[],"errorDetails":[]}

Thx for your help.