Cc field of the Send Email action that has white spaces between the values or has semicolons instead of colons as separators returns a SuiteScript Notice:
Notice (SuiteScript)
One or more cc emails are not valid.
Solution
1. Navigate to Customization > Workflow > Workflows
2. Click Edit on the Workflow with the Send Email action
3. On the Cc field under the Recipient section of the Send Email action, remove the white spaces and use colons instead of semicolons to separate emails