voice dream reader does not start on my apple watch 4.4

Hello everyone, I have just bought my first apple watch. I have the model 4.4. I tried to start voicedream reader, which appears to be available on my apple watch. However, when I double tab on the screen, the voice over says: "loading" and nothing happens. Later on, the apple watch restarts. I tried to reinstal voice dream reader on my iphone with the same result. Anyone has any suggestions? Thank you.