There is a known issue in the 4.3 platform of Results that older reports with a green gradient header causes errors when trying to format the report.
To avoid this, rest the default style, as demonstrated in the screenshot below:

There is a known issue in the 4.3 platform of Results that older reports with a green gradient header causes errors when trying to format the report.
To avoid this, rest the default style, as demonstrated in the screenshot below: