Error adding teams but it works on graph explorer

Hi,

I'm using the Admin Tool to open Teams but since yesterday it gives me an error on this simple run:

{
  "template@odata.bind": "https://graph.microsoft.com/beta/teamsTemplates('educationClass')",
  "displayName": "My Sample Team final",
  "description": "My Sample Team’s Description",
   "channels": [
        {
            "displayName": "Announcements",
            "isFavoriteByDefault": true,
            "description": "This is a sample announcements channel that is favorited by default. Use this channel to make important team, product, and service announcements.",
    "tabs": [
                {
                    "teamsApp@odata.bind": "https://graph.microsoft.com/v1.0/appCatalogs/teamsApps('com.microsoft.teamspace.tab.files.sharepoint')",
                    "name": "Sub%20de%20Formandos",
                        "configuration": {
                            "entityId": null,
                            "contentUrl": "https://xxxxx.sharepoint.com/sites/MDLPJAVICD112/Submisso%20de%20formandos",
                            "removeUrl": null,
                            "websiteUrl": null
}
                }
    ]
        }
  ]
}

It used to work fine! And if I run ths on Graph Explorer it's ok. Can you please help?

Thanks in advance!

leeford / TeamsAdminTool

Error adding teams but it works on graph explorer #1