This thread is resolved. Here is a description of the problem and solution.
Problem: I start getting issues with the WordPress editor when Yoast and Yoast Multilingual are active
Solution: Please update your site to WordPress 4.1.X in order to fix this issue
This is the technical support forum for WPML - the multilingual WordPress plugin.
Everyone can read, but only WPML clients can post here. WPML team is replying on the forum 6 days per week, 22 hours per day.