Now monitor say  “ ERROR”

Sorry ….Arduino UNO

Arduino 1 

Done: install 1.8.19 , moved pin 11 and 10 to TX and RX, downloaded sketch

Nothing change

Software Serial.h not found….SoftwareSerialTX only offered in manager

I follow exactly WIKI page also for wiring.

The only different thing I find is library: 

Also following suggestion in this post I cannot success

https://forum.arduino.cc/t/sensor-shows-the-same-value-a02yyuw/859239/10

Can you send me a working sketch please and right library?

Regards

Marco