RouteNotFoundException "lexik_translation_new" as such route does not exist

Do not forget make changes in files:

• *.html.twig
• Config/routing/routing.yml
• Config/routing/app.yml

Especially in the second, do not forget to add there these lines:

lexik_translation_edition:    resource: "@LexikTranslationBundle/Resources/config/routing.yml"    prefix: /translations/grid