Embedding reports with viewer permission

Hi,

I am trying to embed reports in a custom web system I've created. It is a python + js project, and I am using the following parameters to generate the token:

Python:

data = {
    "accessLevel": "View",
    "allowSaveAs": "false"
}
generate_token_url = 'https://api.powerbi.com/v1.0/myorg/groups/%s/reports/%s/GenerateToken'

Javascript

var config= {
    type: 'report',
    tokenType: models.TokenType.Embed,
    accessToken: access_token,
    embedUrl: embed_url,
    id: report_id,
    permissions: models.Permissions.View,
    pageView: "fitToPage",
    settings: {
        filterPaneEnabled: false,
        navContentPaneEnabled: true
    }
};

All users have Viewer permissions in the workspace, and viewer access to the report. The problem is that all of this does not work, and I receive the message below when I try the GenerateToken API :
{code: "InvalidRequest", message: "Only folder user with reshare permissions can generate embed token"}

If I give some user a higher privilege access, such as workspace member, it works. What does that mean? It is not possible to give only viewer permissions to embedded reports? I can't let users bypass the access control I built in my web system by accessing the reports directly on powerbi.com.

P.S. I already tested by giving share permission to the user (report and dataset) and the same problem occurs