Yellow Box and calendar issues

Hi. I am developing a website with its plugin. However, I have two problems. First. On the front of my website, in the part of the booking, when hovering over the text of the booking, a yellow box appears, besides that the text allows me to edit it even if it is not a logged in user. The second problem is when I click on the calendar icon, it does not display, nor the time. The theme that I work with is Divi, from Eleganth Themes, and I use the most recent WordPress version, I also have the plugin updated. I use Chrome, but the problem appears also Firefox and Edge.
The goal is to buy the plugin, however, if I can not solve the problem before, the client will hardly want to pay for it. Thank you very much.

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