That can be caused due to a few reasons.
Main reasons are mostly poor Internet connection or simply that there are no reward ads to display.
If you encounter this issue, we advise switching between your device's networks (Wi-Fi/LTE/4G/3G) and check if still no ads are available.
If changing networks does not resolve the matter, please hit the "Contact Us" button in the upper right corner and let us know about it.
