This problem can have multiple reasons why it doesn’t work. Here are some steps that you can try by yourself to solve this issue.
Check if you are connected to the internet
Check if your browser is up to date
Clear your browser’s cache (See the following link)
In special situations, your IT department may have restrictions on the company network. We recommend contacting your local IT department.
If the above steps don't work, don't hesitate to contact us at firstname.lastname@example.org or call +31 (0) 70 204 22 25. We will help you further with this issue.