I've created a bot based on the following sample: https://github.com/microsoft/BotBuilder-Samples/tree/main/samples/typescript_nodejs/57.teams-conversation-bot
Everything looks well so far and worked in my first bot. But with my second bot I've created when I start a conversation with the bot, I get a "Failed to send" error in Microsoft Teams on my desktop.
When I use teams in the web I can see in the dev tools the following error message for the request: https://emea.ng.msg.teams.microsoft.com/v1/threads
Error:
One or more of the user ids provided are not valid.
I'm lost on what could be wrong. Any hint would be highly appreciated.