call of overloaded 'print(DeviceAddress)' is ambiguous

Can you please write an example, I am completely new to arduinu and I can not find a case of multiple sensors to the web server

   for(byte b=0; b<8; b++)
   {
      client.print(Thermometer3[b]);
   }

Though I still can not imagine what use the address is going to be, on the browser.

You have 3 temperature sensors. I would expect to see 3 temperatures, not three addresses, on the web page.

Actually, it appears that you have 4 temperature sensors, one DHT type and 3 DallasTemperature type, and are sending the temperature read from the DHT type, and the addresses of the DallasTemperature type, to the client. Like I said, I can not imagine why.