We have the same issue. Wordfence is flagging the Jupiter X Core plugin.
Critical Problems:
* The Plugin “Jupiter X Core” has been removed from ww.wp.xz.cn but is still installed on your site.
Should we be worried about this?
I had to downgrade to 4.7 as well, after combing through all the forums I could on this topic. I was using v5.0 but the forms wouldn’t submit on Safari. Would love it if someone could provide a solution for the current version.