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Are you having this issue with one specific form? If so, please provide us with the form name/link, so we will be able to investigate this.
The form name is JBT Birthday Sign Up and the link to the form is:
I was able to replicate the issue at my end. As I investigate the issue into deeper, I found that it is caused due to a submission with only year selected on Anniversary field.
Since this field is not required field, users are able to submit the form by filling atleast one dropdown from this field. I've edited the submission to remove this year from it and now the excel has loaded fine at my end without any errors.
Please check now and let us know if the issue still persists. We will be happy to look into this issue further.
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