When a Purchase Order is created when the Supplier doesn't have an email address, there is no copy of the Purchase Order to open or print out.
If this happens, a Purchase Order can be re-printed through Financials using the following steps:
Click Financials then select Purchasing.
Scroll to Enquiries then click Outstanding Orders.
Search for the Purchase Order you would like to print.
On this Purchase Order, select the three-dot menu and click Email Order.
Enter the Email Address you want to receive the Purchase Order.
When this has been done, you can check your emails and will find a new email with a PDF copy of the Purchase Order attached.