Issue
Scheduled report fails to send with more than 3 email addressed in the Additional To field in the Delivery option.
Resolution
Check the format of the email addresses: If separated by a comma this will error if more than 3 email addresses in Additional To Field in delivery option
name1@test.com, name2@test.com, name3@test.com, name4@test.com >>> This will error
Correct Format:
name1@test.com;name2@test.com;name3@test.com;name4@test.com