[Closed] Wrong images shown and unable to upload to media library after installing WPML

Background of the issue:
Right after installing WPML and translating the content on some pages, some of the pictures shown are randomly wrong. I am using BeTheme and in the BeTheme builder the correct image is selected, yet it will show the wrong image. After activating WPML the Media Library also stops working, in a way that I am unable to upload and select any of the new images from the Media Library. I've reinstalled the plugin a few times, but when activating WPML this always start to happen. Link to a page where the issue can be seen: hidden link

Symptoms:
Some of the pictures shown are randomly wrong. The Media Library stops working, making it impossible to upload and select new images.

Questions:
Why are the images shown randomly wrong after installing WPML?
Why does the Media Library stop working after activating WPML?
How can I fix the issue with the Media Library not allowing uploads and selections?
Is there a compatibility issue between WPML and BeTheme?