Thank you for confirming that the issue https://learn.microsoft.com/en-us/answers/questions/1662087/how-to-copy-the-data-from-amazon-s3-to-azure-sql-d?page=1&orderby=Helpful&comment=answer-1516080#newest-answer-comment is resolved by fixing the UTC time.
For the copy activity throwing an error
If the data from source is coming as null, the SQL column is configured with not null, so it not accepting nulls.
Try using mapping dataflow look up activity, you can count the null values and redirect them.
Regards,
Oury