Recently (in the past 1-2 weeks) I have been unable to edit or reprint invoices, the options at the foot of the form are greyed and present a stop icon when passing the mouse across. I've been getting around this by searching sent emails and forwarding as I've been too busy to attempt to sort.
I've just had the same issue with attempting to convert a quote to an invoice, all the options at the foot are greyed out.
In the past I've been able to complete all these actions without issue.
How do I return the system to this desirable, and workable, situation?