Importing microsoft api data in power bi fails

Nothing has changed from permissions or anything at our side. It has always worked until Monday.

The dataflows are in the online version of Power BI, and we want to connect to login.microsoftonline.com. So no gateway is needed. Changing regions also didn't work.

I have 2 functions. One gets an token for the async api of microsoft, the other for the non async api of microsoft. Both don't work.

//non async api token

let
  Source = () => let
  apiUrl = "https://login.microsoftonline.com/<id>/oauth2/token",
  body = [
          client_id="<clientid>",
          grant_type="client_credentials",
          client_secret="<secret>",
          resource="https://graph.windows.net"
],
  Source = Json.Document(Web.Contents(apiUrl, [Headers = [Accept = "application/json"],
 Content = Text.ToBinary(Uri.BuildQueryString(body))])),
  access_token = Record.Field(Source, "access_token")
in
  access_token
in
  Source
  
//Async api token
  
let
  Source = () => let
  apiUrl = "https://login.microsoftonline.com/<id>/oauth2/v2.0/token",
  body = [
          client_id="<clientid>",
          grant_type="client_credentials",
          client_secret="<secret>",
          scope="https://graph.microsoft.com/.default"
  ],
  Source = Json.Document(Web.Contents(apiUrl, [Headers = [#"Content-Type" = "application/x-www-form-urlencoded", #"Accept" = "*/*"],
  Content = Text.ToBinary(Uri.BuildQueryString(body))])),
  access_token = Record.Field(Source, "access_token")
in
  access_token
in
  Source