Im flying with Jet2 next week and I tried using my PO booking number but it wasnt having it. Booked the seats via the PO website fine ages ago. Does it open a few days before the flight?
I have just downloaded mine for our cruise in two weeks. Try using a different browser like Chrome, its been fussy over the years with different browsers.
Requested Thursday, applied today. Very happy with the timing. I remember putting everything in an envelope, traipsing to the post box and waiting weeks!