Visualizations don't work

I started power bi with a free license, and then I upgraded to the pro version. The thing is that I am still having the same problem as before, I can't view any visualization (couldn't retrieve the data for this visual, please try again later).

I was having the same problem before, but it was because my trial version expired, and now that I have the paid version, I don't know what's wrong.

Can someone please help me?

Thanks in advance.

nando88 In past I've seen this error for quite a few numer of issues and there isn't a single problem that can cause this type of error. My suggestion is to rather than spending time troubleshooting it I would say re-publish pbix files and see if that error is gone. Obviously as error suggests it couldn't get the data for visual, when you re-publish ensure gateway and everything is setup and working if you are using those Pro features. I have also seen this error occuring when a field used for the visual gets data that causes type mismatch or if field is INT but data causes NaN.