Error 641 when you accept or access league invites

'Error 641' happens for 2 reasons. If you're attempting to accept an invite that has already been accepted by another manager or if you're trying to access the league through the invite link sent via email.

• Multiple invites to take over a team - Commissioners can send out multiple invites for a team. The first manager to join gets the spot making the other invites invalid.
• Trying to access your league via the invite link - Using the invite link to navigate to your league won't work. Instead you'll need to login at sports.yahoo.com.