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Dear Prestashop Forum,

I tried to update from 1.7.8.11 to the latest 8 version via 1-Click Upgrade.

What I have done so far:

• removed every thirdparty addon
• updated every other addon
• disabled cache
• removed cache (var/cache/...)
• switched to standard-theme

So when I tried to run the update, it crashes after cleaning file cache with the following error:

Cleaning file cache
[SKIP] directory "/app/cache/" does not exist and cannot be emptied.
[CLEANING CACHE] File CACHEDIR.TAG removed
[CLEANING CACHE] File prod removed
Running opcache_reset
[INTERNAL] /home/.../vendor/prestashop/autoload/src/LegacyClassLoader.php line 175 - include(/home/.../var/cache/prod/class_index.php) [function.include.php]: failed to open stream: No such file or directory
[INTERNAL] /home/.../vendor/prestashop/autoload/src/LegacyClassLoader.php line 175 - include() [function.include.php]: Failed opening '/home/.../var/cache/prod/class_index.php' for inclusion (include_path='/home/.../vendor/pear/pear_exception:/home/.../vendor/pear/console_getopt:/home/.../vendor/pear/pear-core-minimal/src:/home/.../vendor/pear/archive_tar:.:/usr/local/share/pear')

So it clears the cache folder and then it want's to include the file class_index.php from there?

I don't understand that.

Does someone knows this behavior?

Thanks for your thoughts and help.

Cheers,
Michael

Edit: the 1-Click Upgrade Module ist on it's latest version. (6.0)