Hi neecee81,
Thanks for posting in Apple Support Communities. It would be best to first isolate this to either your iPad or your tv provider. Are you able to sign in when you visit the provider's webpage? If you have another device, also test to see if you are able to sign in there.
Use the guidance below from Sign in with your TV provider on your iPhone, iPad, or iPod touch - Apple Support including making sure your iPad is up-to-date since that may be an important overlooked step to help with many issues.
"Sign in from your iPhone, iPad, or iPod touch
You can sign in with only one TV provider at a time. Here's how:
- Make sure that you have the latest version of iOS or iPadOS.
- Go to the Settings app, then tap TV Provider.
- Select your TV provider* from the list. You can also scroll down to choose a TV Provider from a different country or region.
- Enter your TV provider account information. If you aren’t sure, contact your TV provider.
- After you enter your TV provider account information, tap Sign In."
Have a great day!