Clickable Map | Link in same tab doesn't work

On my website, I embedded a clickable map by www. createaclickablemap .com/ - a very handy widget. Unfortunately, the links that actually link to my own site won’t work in the same tab.

I got this answer by the support of clickable map:

The WIX API has a lot of function and one of them it is listen to iframe events (Example: the click event on a page). I just haven’t figure out how to use it properly. After all this time I didn’t get anywhere.

It is a bit of challenge and frustrating because it is a simple thing. If I manage to get the click event, I adapt my code (the one you already have) and that’s it. That last part will take me 10 minutes top.
Any idea to solve this problem?