Problem in app

Whenever I try to use a voice, it always says it didn't work, and asks me to try again, and when I try, it fails, I've checked my internet several times, and nothing is wrong, there's just something wrong with it, I already bought the voice, and it doesn't work, I already checked and there is no problem with me here, the problem is with the application, if you could help me please, I would appreciate it