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The transaction is 44 sat/vbyte, due to certain reasons, the transaction can not be confirmed, at the
moment, the feerate that can put your transaction in a block fast is around 210 sat/vbyte at the moment. I would have said you can contact the sender to pump the fee, but the transaction is not supporting replace-by-fee.
You do not have option, but I have just used
ViaBTC free acceleratator now, it has filled up for this hour, you will have to wait for the next hour, and try to accelerate it freely at the earliest time of another hour. Probably, it should work, very possible your transaction will be placed in the next block mined by ViaBTC if the transaction is successfully added along.