The username is not registered on this site

Hi,
on local environment all is OK. But on staging I have strange problem.
Authentication is OK with username and password and I receive token, but when I use this token in Header as Bearer i got strange error:

{

“code”: “invalid_username”,

“message”: “<strong>Error:</strong> The username <strong>{\”typ\”</strong> is not registered on this site. If you are unsure of your username, try your email address instead.”,

“data”: null

}

any ideas?