Network time out on my vision app,

Hi, I have a question, if someone can help. I have an issue with my vision plus. I connect my phone and my app with camera on Phantom 2 vision plus and everything seems fine, but when I try to take picture it says connection broken and network timed out. I had a crash with it but it worked after that. But today just suddenly it doesn't take pictures or videos. I can also control gimbal without problems. Can someone tell me did you have problems like this?