What is happening with the GPS sensor

my application that is in Play Store.
GPS sensor does not work, out of nowhere it stopped working. when I do the test in thunkable I get this


these are the blocks to see that if I threw latitude

the weird thing is that the application was working well and suddenly the sensor does not work

thunkable continues to have a connection with the app after it is compiled, and if there is an error in thunkable it affects all our apps
please help