is it possible that you store the code in a local folder so you don't have anything to do with the cloud
have you tried a different com port yet?
Is the serial monitor not open in your task bar?
I cant change com port because it has only one com port
and I cant even open the serial monitor since it will just say serial port unavailable
and I have given a task by my teacher to use Arduino cloud for this project
I have faced the same issue as yours. Here is how I resolve it. Try to close all your arduino IDE opened in your desktop. Then compile and upload the code again using arduino IOT cloud. Problem should be resolved. Hope it helps!