error loading Seaside - ''Cryptography'' not found

Hi,

I took a new Image and tried to load Seaside as described here:
https://github.com/SeasideSt/Seaside
with:

Metacello new
  configuration:'Seaside3';
  repository: 'http://www.smalltalkhub.com/mc/Seaside/MetacelloConfigurations/main';
  version: #stable;
  load

I get the following error:

"'project group, or package named: ''Cryptography'' not found when used in requires: or includes: field of package: ''Seaside-Security'' for version: 3.2.0 of ConfigurationOfSeaside3.'"

I try with github now...

Regards
Sabine

ok, with the github version, it works.