Try if any of the actions listed below help with the issue.
1. Clear browsing history and cookies (time range: all time)
2. Restart your device (recommended)
3. Check that you have the latest browser version and update it if necessary (App Store or Play Store)
4. Try another browser (supported browsers are Chrome, Firefox, and Safari)
If these did not help, contact us and include a full-screen screenshot of the issue in your message and please tell us which game it is so we can investigate.
You can find your game history here.