Please check if the problem might be caused by your internet connection. 

• In case you are using the app you can try to deinstall it and download it again. Moreover, you can try to delete the cache in the app settings.
• If you are using a Computer/Laptop, it could be possible that the problem is caused by your browser. Please update your browser and delete the cookies. You could also try using a different browser - we recommend using Google Chrome.

If you have any further questions feel free to contact my support.