Converts the error to the specified type.

# Side Effects

The error is extracted and becomes `None`.

# Safety

1. If the data type inside and the data held in the conversion function no longer match, a `UB` will occur during the
   conversion to [`core::any::Any`].
   Therefore, ensure that the consistency is correct.

> [!TIP]
> However, simply entering the wrong argument is not a problem.
> An error will occur, but a `UB` will not happen.
> A `UB` only occurs when there is an inconsistency between the internal data and the conversion function.
