How to upgrade Mailman

[H2Hosting.com]

Do you know how to upgrade Mailman?

I run /scripts/mailman212, but nothing changed - when I visit mailman interface, I see v. 2.0.13

Also one of our customer cannot login to admin part.

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Bug in Mailman version 2.0.13

We're sorry, we hit a bug!
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cPanel.net Support Ticket Number:

[EcpHosting]

We have the same error... grr.. any idea whats wrong?