You need to have 4 things
Here's where you can find them:
1. Go to the Fixtures tab.
2. Look up the opponent by pressing the green Opponents button.
3. Click here to see how you create an opponent.
4. Check whether the subscription has been created by scrolling all the way down in the fixtures tab.
5. Click here to see how you can create a subscription.
6. Select the right season at the top right.
7. Make sure you have a seating plan.