When I try to submit a new app version, I get this message: "The Apple Developer Program License Agreement has been updated and needs to be reviewed. In order to update your existing apps and submit new apps, the Account Holder must review and accept the updated agreement by signing in to their account on the Apple Developer website."
But I have signed the latest agreement and cannot find anything else to sign. On the main page (https://developer.apple.com/account) there is no longer a notification about an agreement to sign.