1.

Click turn on validation.

Error sections appear as hidden on the Data Validation tab.

2.

Click show.

Each error is displayed as a line item with a corresponding fix button.

3.

Click fix to the right of an error.

You are taken to the relevant page where error messages are displayed and fields are outlined in red:

4.

Fix the error and click save.

The error no longer appears on the Data Validation tab.