An anonymous tester writes:

Once one completes the purchase for storage-time, it does not update on Gridsync even after completing the connection

Enclosed logs point to issues with certificate verification:

[_zkapauthorizer.controller.PaymentController#error] Redeeming random tokens for a voucher (b'Vw28-2m7eLckt5SBi8--CD4ZyulzHxN2JAEq0CZJhVuB') failed:
RequestTransmissionFailed([<twisted.python.failure.Failure OpenSSL.SSL.Error: [('SSL routines', 'tls_process_server_certificate', 'certificate verify failed')]>])
[_zkapauthorizer.controller.PaymentController#info] Temporarily suspending redemption of b'Vw28-2m7eLckt5SBi8--CD4ZyulzHxN2JAEq0CZJhVuB' after non-success result.