Sub user unable to view submission data?

I have set up an additional user but when I or they look onto that account, there is no information on the forms

Apologies for the inconvenience. To know more about the sub account user and sharing form's access and submission data, please do check this guide: https://www.jotform.com/help/232-How-to-share-forms-with-a-sub-account-user 

Now with regards to the problem, I see you are in EU, to view the form submission data properly, I strongly advise to enable the "Europe Datacenter" option in your Account->Data page if you are in EU. Here's a screenshot to find this option:

This option is our solution for the invalidation of the EU Safe Harbor policy, here's a blog post about this: https://www.jotform.com/blog/178-EU-Safe-Forms-Our-Solution-to-the-EU-Safe-Harbor-Invalidation 

Let us know if that resolves the problem.