Placing Event+ CMS on front-end unable to click on startdate and enddate


I am currently having troubles as I have moved the CMS page of events+ to the front end using iframe so users with special privilege can edit the website. However, before I was able to click on the start or end date and calendar will show. Same as the feature image or image upload function it will pop up a window but instead right now I am redirected to the feature image page instead.

I was wondering is this due to some javascript error, has anyone encountered it. It was working before but I think the new Wordpress update killed those pages.