MDErrorReporter/exceptions/updates/MDcouldNotSaveException.php

<?PHP
declare(strict_types = 1);

/**
 * Exception thrown in case an update failed.
 */
final class MDcouldNotSaveException extends Exception {
    /**
     * Error message.
     *
     * @return string
     */
    public function errorMessage() {
        //error message
        return 'Could not save.';

    }
}