I have had my shop running for a couple weeks with no trouble at all. I sell 100% digital products and I use Paypal Express.

For some reason, I have had two customers notify me this evening that they cannot process their order, they receive an error that says I'm not shipping to their region at this time, 'please try again later'.

Does anyone know what might be causing this? I have received orders from several countries so far, and I haven't seen this before.

Please help, I don't want to leave my customers hanging!