I contacted Brainstorm Force. The reply was that the latest version has a new Cross-Site Copy Paste feature and the JS conflicts with RankMath in Elementor. I just disabled that feature and now it works again.
Thanks for your reply. Okay I will find a way for the long tail keywords.
Regarding my second issue that RankMath is blank in the Elementor issue. It is a conflict with Ultimate Addons for Elementor. This is a plugin from Brainstorm Force. I have installed version 1.24.0. I keep it now disabled and just wanted to let you know. Perhaps RankMath can contact Brainstorm Force.