Error 406 when update xd5 version 12 
Autor: C.J. V.
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after installing x5 version 12 the update procidure gives an error 406.
Please help!
C.J. van der Zwan
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Download the full version here: https://answers.websitex5.com/profile/downloads
Install that one, this shuld do the trick. (your projects shoud be save but a backup with step 5 from your project never hurt)
BR André
Autor
It don't work, cannot update X5 version 12!
C.J van der Zwan
. . . you did read this post (or similar) ?
https://helpcenter.websitex5.com/post/89997
Hello C.J.V.,
You must have a localised network issue due to firewall/antivirus/proxy settings, etc.
Your screenshot indicates that you are still trying to update within the program itself. Please do as Andre suggests here instead:
Once you have downloaded the setup file that Andre linked to, right-click on it and select 'Run as administrator' - this will install the new version over the old one - there is no need to uninstall first.
Make sure WebSite X5 is closed before attempting to install. It would also be a good idea to reboot your computer before installing also.
Please keep us updated.
Kind regards,
Paul