Activation error 321 
Автор: M. V Doremalen
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I bought an update from WebSite X5 Professional 10 to WebSite X5 Professional 11 on 01-10-2014 and yesterday i must put the registration code again and today i must put the code again and it keeps saying Activation error 321
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See these posts:
https://helpcenter.websitex5.com/post/60972
https://helpcenter.websitex5.com/post/102149
Goodluck !