The interface doesn't work properly, dynamic graphs do not display correctly.

The application has been tested with IE Edge 38.14393 / EdgeHTML 14.14393, Chrome 56.0.2924.87, Firefox 52.0.2 and Safari 10.1 (10603. If you are using\ the older version of one of these browsers or a different browser, you might have some rendering issues.
Adblocker is causing also some rendering issues.

A step is failing without explanations

The most probable cause is a misformatted input data file, or an input data file containing unexpected characters (e.g. the data table should contain only numeric values).

The 3D plot is blinking?

Updating your browser should fix this issue.