Hi, I just found a little bug. Steps to reproduce:

1. Have both Polylang Pro and Elementor Pro installed (I guess it'd the same with Elementor Free)

2. Create a page on default lang, do something with elementor, save.

3. Activate polylang content duplication on that page. > note it was not activated before

4. Click another language to translate. > till now all fine, you will see the post traslation wp edit page

• Now click the blue button to modify with Elementor > here's the issue: you will be redirected to the frontend and see the 404 page template (page not found)

This does not happen if polylang content duplication was already active before (so before point 2.). In that case all goes fine and elementor's content seems to be correctly duplicated between languages (tried only few simple widgets).

Using wp 4.8, on latest firefox, osx 10.11.6