The expression return new SMartins\Exce...xception->getMessage()) returns the type SMartins\Exceptions\JsonApi\Error which is incompatible with the return type mandated by SMartins\Exceptions\Hand...stractHandler::handle() of array|Illuminate\Support\Collection.
In the issue above, the returned value is violating the contract defined by the
mentioned interface.
Let's take a look at an example:
interfaceHasName{/** @return string */publicfunctiongetName();}className{public$name;}classUserimplementsHasName{/** @return string|Name */publicfunctiongetName(){returnnewName('foo');// This is a violation of the ``HasName`` interface// which only allows a string value to be returned.}}
In the issue above, the returned value is violating the contract defined by the mentioned interface.
Let's take a look at an example: