Upgrade 11 to 12 error

[Schmu]

Update to 13 fails - core/shipped.json is not available

Looks I solve it: go to your nextcloud installation path, for me it is /var/www/nextcloud and my data user is www-data /var/www/nextcloud if you will see something like this, proceed to step 3: Copy all files from Nextcloud update downloaded by Web-Updater to actual nextcloud folder cp -rf data/updater-XXXXXXX/downloads/nextcloud/ /var/www/ (it will be copied into /var/www/nextcloud) for me it was needed to set correct permissions by running chown -R www-data:www-data * the…