Problem symbols when Parking domain and WordPress installed in different folder

Hi,

I really love your theme, it’s the best! However, I’m struggling with this problem for some time and I can’t find anything related to it.

I installed WordPress at http://robertrainer.quijost.com since I’ve got that domain for free from my hosting provider. Then, I installed Enfold Theme on it. I customise it and everything was perfect.

Now I’ve got a domain http://robertrainer.es and I would like to have everything there, so what I did is to park the domain and then I changed it in WordPress: Settings > General > Site Address (URL)

Now I can access to http://robertrainer.es without any problem.

The issue is that now all the symbols of YouTube, Instagram, Facebook, and many others don’t appear properly in any explorer (they look like squares or chinese letters or similar).

https://postimg.org/image/ulzy8abvb/

Is there anything I can do it to change the symbols and make them right as it was before?

Thank you!