Can't set up as self-employed

I'm in the process of setting up as self employed but am having problems with the platform. I complete the sign up steps and everything has a green tick. I then go to the final page and click the declaration and next but the platform then logs me out rather than going to the acknowledgement page. I've tried completing this for on Edge and Chrome and both have the same issue. Is anyone else having this problem or has a solution please?

Hi Sarah,
Please clear cache and cookie. 
Edge
Select the Three horizontal dots (describes as ""Settings and more"") from the right-hand top corner.
Select ""Settings"" from the list that appears.
Select ""Privacy & security"" from the right of the menu that appears.
Locate the ""Clear browsing data"" section.
Select the ""Choose what to clear"" button.
Ensure there is a tick in the ""Browsing history"" cookies and saved website data, Cached data and files and the Tabs I've set aside or recently closed checkboxes.
Select ""Clear""
Click the Chrome menu on the browser toolbar (3 small dots in top right-hand corner of screen).
Select More Tools > Clear browsing data.
Choose a time range at the top. To delete everything select All time.
Select Clear data.

If this persists please call the Technical support with HMRC online services
Thank you.