How to address 'binary operator 'x' cannot be applied to operands of type 'y' and 'z'' in swift?

The error means that you're trying to use an operator on two types that it doesn't support. Example:

let text = "Hello"
let number = 5
let result = text + number

Solution:

let text = "Hello"
let number = 5
let result = text + String(number)

Always ensure operands are of compatible types for the used operator.