Background of the issue:
I am trying to create a new post and translate it. I am using Salient Theme and WP Bakery. Never had a problem before. Link to a page where the issue can be seen: hidden link
Symptoms:
I get a new warning banner (hidden link) and a critical error when I try to save the draft or update the post (hidden link). The WPML Translation Management (for the post) hangs (hidden link).
Questions:
Why am I getting a new warning banner when trying to translate a new post?
What is causing the critical error when I try to save the draft or update the post?
Why is the WPML Translation Management hanging?