Steps:
1. Go to "Create", and choose "Article"
2. Add second author with + button
3. Delete author from step 2
4. Fill the rest required fields
5. Click "Publish" - nothing happens and console shows:

TypeError: Cannot read property 'classList' of null
/js/7853bf8.js:2466:23 EzAuthorValidator.toggleInvalidState()
/js/7853bf8.js:2556:18 EzAuthorValidator.validateField()
/js/7853bf8.js:2603:40 fieldsToValidate.forEach.field()
Array.forEach ()()