IcelandAir review: Covid-related voucher for Iceland Air

I received a one year voucher to rebook a canceled flight, good for one year from March 15 2024 to March 15 2025. I tried to book flight on March 14, but was denied, saying it had expired. I have a picture of this transaction with the time stamp of March 14 at 9:54 pm with the statement that Gift Certificate RYZXTRN9 was expired. This is for a $1,463 ticket so I am broken hearted to lose it. Can anyone help, please.

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