We wanted to take a minute to update you on a bug that affects V4 reporting. This bug affect all dates passed in to the v4 api.
Date parameters specified like the one below will fail with an error:
If you remove the xsi:type="xsd:date" attribute as shown below, the call will work:
We are working to correct this issue as quickly as possible. In the meantime, removing xsi:type="xsd:date" from your V4 code will allow you to work around the bug.
We apologize for the inconvenience, and we will notify you as soon as this issue is corrected.
-- The AdWords API Team