@diraac1 Yes Crowd is a Public Forum and not a direct support point for Optus. If you post more some more information as to the device etc you are using someone maybe able to help you.
Have you looked at the Troubleshooting Page for Optus Sport
If you look at the App Store Details for Optus Sport there is an email address for the App Developer. I cannot post the address as Yes Crowd does not allow the posting of email addresses for Privacy and Security.
You can also message Optus Support from the My Optus App, Facebook or Instagram.