Path to validation language files is incorrect.

Meta-box is throwing an error when trying to load the validation file:
wp-content/plugins/meta-box/js/js/validation
one too many /js

Upon further inspection of inc/validation.php we see this function:

public function enqueue() {
		wp_enqueue_script( 'rwmb-validation', RWMB_JS_URL . 'validation.min.js', [ 'jquery', 'rwmb' ], RWMB_VER, true );

		$locale       = determine_locale();
		$locale_short = substr( $locale, 0, 2 );
		$locale       = file_exists( RWMB_DIR . "js/validation/i18n/messages_$locale.js" ) ? $locale : $locale_short;

		if ( file_exists( RWMB_DIR . "js/validation/i18n/messages_$locale.js" ) ) {
			wp_enqueue_script( 'rwmb-validation-i18n', RWMB_JS_URL . "validation/i18n/messages_$locale.js", ['rwmb-validation'], RWMB_VER, true );
		}

		RWMB_Helpers_Field::localize_script_once( 'rwmb-validation', 'rwmbValidation', [
			'message' => esc_html( apply_filters( 'rwmb_validation_message_string', __( 'Please correct the errors highlighted below and try again.', 'meta-box' ) ) ),
		] );
	}

We changed to the following as a workaround... but please, review and fix this in the next release:

public function enqueue() {
		wp_enqueue_script( 'rwmb-validation', RWMB_JS_URL . 'validation.min.js', [ 'jquery', 'rwmb' ], RWMB_VER, true );

		$locale       = determine_locale();
		$locale_short = substr( $locale, 0, 2 );
		$locale       = file_exists( RWMB_DIR . "validation/i18n/messages_$locale.js" ) ? $locale : $locale_short;

		if ( file_exists( RWMB_DIR . "validation/i18n/messages_$locale.js" ) ) {
			wp_enqueue_script( 'rwmb-validation-i18n', RWMB_JS_URL . "validation/i18n/messages_$locale.js", ['rwmb-validation'], RWMB_VER, true );
		}

		RWMB_Helpers_Field::localize_script_once( 'rwmb-validation', 'rwmbValidation', [
			'message' => esc_html( apply_filters( 'rwmb_validation_message_string', __( 'Please correct the errors highlighted below and try again.', 'meta-box' ) ) ),
		] );
	}