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Your first approach should be asking your host to fix the PHP
session save path to something which is writable by your hosting
account. This is a very common misconfiguration issue on Plesk-based
hosts. If your host can't fix it, they might be able to give you
instructions for creating a
override the PHP session save path. No matter which solution they
provide, you don't have to run Kickstart again or upload the
extracted files again; you can access ANGIE again by visiting
www.example.com is the domain name you are restoring
Another solution is to change the permissions of the
installation/tmp directory after Kickstart has
extracted your archive (just right before you click the
button) or after you have
uploaded the extracted files if you're not using Kickstart. In both
cases, try using your FTP client to change the permissions of the
installation/tmp directory (but NOT its
contents!) to 0777. Then, click on the Run the Installer button in
Kickstart or access ANGIE again.
If both of these solutions don't work out for you, you will unfortunately have to go through the scenic route, i.e. perform a manual restoration. The complete instructions are described in the "Unorthodox: the emergency restoration procedure" section of our User's Guide. Our suggestion: it's best to switch to a different host. There is a strong possibility that Joomla! might not work properly unless you have a working PHP session storage.