Missing subtitles in version 0.4.1

Dear sirs,
I have installed Popcorn Time version 0.4.1 on my computer, the operating system of my machine is Windows 10. Everything was working normally when suddenly I am no longer able to see the subtitles. Instead of appearing the list of country flags, a black square with an X appears in a small white square. What could have happened? I have not made any changes to the application settings. Have you made any changes to the application settings on your servers? I realized the problem when I went to use the app yesterday.
I look forward to an answer, thanks in advance.