No Internet connection, TCAM module?

Hello to the forum, maybe someone here has a piece of advice, three days I have no Internet connection anymore. Reception is full there, but at the end of the ascending triangle the exclamation mark. Twice now the TCAM module over the Defroster restarted. No improvement. Also the main infotainment system restarted, without success. So slowly it annoys. Software is up-to-date, and all hooks in the privacy menu activated. Does anyone have advice? Greeting Christian