Apple will periodically update its terms of service or other agreements and require the account holder for your organization to accept these conditions.
You should receive an email from apple about these changes or you may be notified by Crisp. We are unable to publish or update apps unless these conditions have been accepted.
You'll know there is a new agreement when logging in to your appstoreconnect account because you will see a banner at the top of the page.

Simply click the blue link in the banner and you will be redirected to a page like this.

What if I don't see the orange banner?
If you do not see this banner it is possible you are not logged in as the account owner.
To check ownership you can select the "membership" button on the left hand menu.

You can find your owner here

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To make your life easier set up auto renewal for your appstore connect account. This is the fee apple charges you to have an app available in the app store.

Need to change account owners?
If you need to change account owners for any reason this can also be done here.