Sometimes things like this will happen when you are using an outdated browser.
We keep our website very up to date and older browsers can sometimes have issues reading our application.
Make sure you are using the most updated version of your browser.
We suggest using Chrome if you are not using it, because it will provide the best performance with our applications. However, if you are having problems still in Chrome or other browsers please contact our Stukent customer support team, and let us know what your issue is and what browser you are using. Providing screenshots will also be very helpful.
If you have any questions you can contact the Stukent customer support team at firstname.lastname@example.org.