This is likely to be because the Member(s) in question has an error in the format of their email address on their Compass record. Common errors include a comma where there should be a full stop or missing out the @ symbol. Please correct this, or ask someone with access to amend the Member’s record, to update the email address accordingly.
If this does not the resolve the problem and the Member is still unable to receive emails through Compass, please contact the Scout Information Centre.