me and some of my colleagues are using MS Teams with a guest access of one our partners. Since the beginning of this week we can neither log-in via Web nor via App. The app always shows the error code "caa30193". When I try logging in via Web, I receive Error 403 (Forbidden). Partner already tried removing us from the chat and adding us again, but we still cannot log-in.
Can anybody tell me where the source for this error message lies and how to fix it?
CAA30193 indicates Teams received an error from the machine’s HTTP stack when attempted to navigate the browser to a page. This can indicate the presence of a proxy, firewall, network issue, or something similar preventing from connecting to service.