👉 In software development, an "unapplicable" error is a type of error that occurs when there is no way to resolve it. This can be caused by a bug in the code or by a mistake made during testing. Unapplicable errors are usually encountered in applications where the code has been written incorrectly or where the user interface has not been designed correctly. Unapplicable errors are often used as a warning sign and should be avoided in production environments, as they can lead to crashes and other