If you click on the "Enter text..." field, does a keyboard appear? After that, if you enter text, it should replace "Enter text...", does it happen? What language are you typing in? Try switching your keyboard layout to English.
Thanks for your quick answer.
When I click on the "Enter text..." field, the keyboard pops up with no problem, but when I write a name it doesn't replace the hint text. I use the spanish keyboard, but as you suggested I did replace It with english(US) first and english(UK) later but it didn't work. I tried uninstalling the spanish keyboard to be absolutely sure I was writing with the correct one, but it still doesn't work.