Try the format in the sample submission

this is the format in my file 19/01/2019 04/04/2019 16/07/2019 18/02/2020 15/07/2020 24/09/2020 20/09/2021 07/12/2020 same as the samplesubmission file

Really? On my end it appears as "2020-09-16"

They are all strings right?

OMG i doubled check the samplesubmission file when i download it it was in this format dd/mm/yyyy

Try submitting in this format "yyyy-mm-dd" as string, dash not slash and check fir improvement in

thank you now it works thank you so much

No problem brother 🙏, good luck 👍