Hubot can't login User not found [403]

[tutorial0]

The error is

INFO [login] Error: {
  isClientSafe: true,
  error: 403,
  reason: 'User not found',
  message: 'User not found [403]',
  errorType: 'Meteor.Error'
}

I'm working on windows and my hubot.cmd file is:

@echo off

call npm install
SETLOCAL
SET PATH=node_modules\.bin;node_modules\hubot\node_modules\.bin;%PATH%
SET ROCKETCHAT_USER=mybot
SET ROCKETCHAT_PASSWORD=xxxxx
SET ROCKETCHAT_URL=https://mydomainname.bla
SET ROCKETCHAT_ROOM=home
SET ROCKETCHAT_AUTH=password
SET LISTEN_ON_ALL_PUBLIC=false
SET ROCKETCHAT_USESSL=true
SET BOT_NAME=mybot

node_modules\.bin\hubot.cmd --name "mybot" %*

I installed rocketchat 3.9.3 with snap(Node v12.18.4, Mongo 3.6.14, Linux 4.15.0-124-generic) and I can login to WebUI with this bot's username and password.
I added my bot exactly as in README file:

From Administration > Users menu
Select + to make a new user
Enter Name, Username, Email (tick verified) and Password
Disable Require password change
Select bot from role selection and click Add Role
Disable Join default channels recommended, to avoid accidental listening
Disable Send welcome email
Save

Anyone knows why?

[oscarkraemer]

What kind of authentication are you using? If you are using LDAP does it help if you turn on Login Fallback https://docs.rocket.chat/guides/administrator-guides/authentication/ldap/basic-settings ?