Message translation is missing

Hello!

There is no translation of the ‘Enter valid code’ message in the file:
../plugins/masterstudy-lms-learning-management-system/assets/js/certificate_checker.js

 /*Check If added*/

	if (vm.code === '' || vm.code.length < 12) {
		vm.status = 'error';
		vm.message = 'Enter valid code';
		return false;
	}