Hi,
I have a problem with a simple flow that has been in use. It has been running fine for a month till today.
What it does - to post a message in Teams Chat as flow bot
Problem - the error indicates the flow bot is unauthorized, which is strange because in another flow, sending messages works perfectly fine. I am very confused.

Here is the error:
Could not retrieve values. The dynamic invocation request failed with error: {
"error": {
"code": "ListTeamsChatsRequestFailed",
"message": "The call to list chats failed with status code: 'Unauthorized' and message: '{\"error\":{\"code\":\"Unauthorized\",\"message\":\"UnknownError\",\"innerError\":{\"date\":\"2022-03-15T14:22:01\",\"request-id\":\"2fbb5e92-0996-4023-b5b5-d0565af2bffa\",\"client-request-id\":\"c3707d43-acfa-4177-a797-504357d37f4d\"}}}'"
}
}.
Any ideas?
Thank you so much.