ForMicrosoftTeams to work in Chromium Browser, it is required to allow the use of cookies. You can allow the use of all third party cookies in Chromium Browser by disabling theBlock third party cookiesparameter underApps > Chromium Browser > Chromium Browser Global > Privacy.
To make the necessary cookie exception while keeping the blocking of third party cookies:
Enable theBlock third party cookiesparameter underApps > Chromium Browser > Chromium Browser Global > Privacy. MS Teams specific parameters are shown to configure the exception.
Enable theEnable Cookies Allowlist for MS Teamsparameter. TheCookies Allowlist for MS Teams becomes activated with the list of necessary URLs as default.