Linking Zoho Project and Zoho Invoice

I am trying Zoho Project and Zoho Invoice to track projects and invoice them. On my main account I can create an invoice from Zoho Project in the Timesheet tab, I can also select "New Invoice for Zoho Project".

For other users on my account I have invited the user to Zoho Invoice and they can log in an view invoices. When they try to do "New Invoice for Zoho Project" i get "You do not have any projects in Zoho Projects. Please contact support@zohoprojects.com for assistance". They also do not see the create invoice link in the "Timesheet" tab for the projects in Zoho Projects even though they are admin users.

Is there some user configuration in Zoho Invoice that I need to configure or am i missing something? Any help would be greatly appreciated.