POST https://directline.botframework.com/v3/directline/conversations 403 (Forbidden)

I get this error since last week. Our bot worked fine and suddenly started giving us this error. Until last week we used https://directline.botframework.com/v3/directline/tokens/generate to generate a token. We then switched to https://europe.directline.botframework.com/v3/directline/tokens/generate because our resources (Azure Bot, Web App running the bot, WebApp running the web chat; all F0-tier) were created in West Europe last year but with no success.

The exact error is:

{
    "message": "ajax error 403",
    "xhr": {},
    "request": {
        "async": true,
        "crossDomain": false,
        "withCredentials": false,
        "headers": {
            "Accept": "application/json",
            "Content-Type": "application/json",
            "Authorization": "Bearer <Token>",
            "x-ms-bot-agent": "DirectLine/3.0 (directlinejs; WebChat/4.17.0 (Full) 0.15.5)",
            "X-Requested-With": "XMLHttpRequest"
        },
        "method": "POST",
        "responseType": "json",
        "timeout": 20000,
        "url": "https://directline.botframework.com/v3/directline/conversations",
        "body": "{\"user\":{}}"
    },
    "status": 403,
    "responseType": "json",
    "response": {
        "error": {
            "code": "RegionNotAllowed",
            "message": "The request received in france but target regional bot belongs to europe. Please check BaseURI  https://docs.microsoft.com/azure/bot-service/rest-api/bot-framework-rest-direct-line-3-0-api-reference?view=azure-bot-service-4.0#base-uri."
        }
    }
}

The error states that the request is received in france, but none of our resources were created in france. I already renewed the keys of the directline channel, which did not work.

Any help is appreciated.

Commencez par la documentation de l’URI de base de Direct Line REST API mentionnée dans le rapport, puis comparez l’endpoint de génération de jetons avec l’endpoint POST de conversation et sa réponse RegionNotAllowed. Reproduisez la requête à l’aide des URL indiquées et confirmez quel endpoint régional est accepté ; le travail est terminé lorsqu’une cause et une résolution confirmées sont documentées, ou lorsqu’il est établi que le problème se situe en dehors de cette bibliothèque cliente.