What does it mean? How do you fix it?
It looks like you're trying to divide a number by something else. check the divisor of your division operator, make sure its what you want it to be.
Maybe your data type is wrong
If you are adding ints it should be only int
You add str and int you will get this error above^^
Maybe the function your are operating is not supported/ is not understood by thonny. Check if the function is correct. It looks like you are trying to divide. So, just check the command.