Featured Image in page / posts not function since the update

We are facing the exact same issue. We upgraded WP to 4.3 last night and now we are not able to set Featured image in page/posts. If we disable the minimax plugin, all works well except the entire site goes blank since the content was created using Minimax builder. This is a critical issue for us now. Please advise.

Checking this issue. Will update you soon. Thanks for reporting.

yes please. Appreciate it if a patch could be released as soon as possible. thanks!

Just released a patch, please update your version.

Thanks for releasing the patch. This works well now.

thank you very much. it works perfectly again. regards