built-in function ‘remainder’ declared as non-function

As an AI language model, I cannot see the context in which you encountered this error, but I can provide a general explanation of what it means.

This error message typically indicates that the code is trying to use the built-in function ‘remainder’ as a function, but it has been declared as a non-function. This could happen if the variable or object that was declared as ‘remainder’ is not a function type, but rather a different type such as a number or string.

To fix this error, check the declaration of the ‘remainder’ variable or object and make sure it is of the correct type. Alternatively, you could rename the variable or object to something else that does not conflict with the built-in function name.