Updated from 12.0.3 to 13.0.0 beta 4. Updater didnt finish after restart. No access to web interface

Nextcloud version (eg, 12.0.2): 12.0.3
Operating system and version (eg, Ubuntu 17.04): Ubuntu 16.04.3
Apache or nginx version (eg, Apache 2.4.25): Server version: Apache/2.4.18 (Ubuntu)
PHP version (eg, 7.1): PHP 7.0.22-0ubuntu0.16.04.1

The issue you are facing:
Run the updater from the web interface. Everything ran good until it came to the end for the page to refresh and drop back to the NC screen. Server is a dead webpage now. According to the config the Updater took it out of maintenance mode but the server is still 12.0.3

Is this the first time you’ve seen this error? (Y/N):

Steps to replicate it:

  1. run the beta Updater

The output of your Nextcloud log in Admin > Logging:


The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

$CONFIG = array (
  'instanceid' => 
  'passwordsalt' => ',
  'secret' =>
  'trusted_domains' =>
  array (
    0 => 
  'datadirectory' =>
  'overwrite.cli.url' => 
  'dbtype' => 'mysql',
  'version' => '',
  'dbname' => 
  'dbhost' => 
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'dbuser' =>
  'dbpassword' => 
  'logtimezone' => 'UTC',
  'installed' => true,
  'maintenance' => false,
  'loglevel' => 2,
  'updater.release.channel' => 'beta',
  'theme' => '',
  'updater.secret' => 

The output of your Apache/nginx/system log in /var/log/____:


Add debug => true to your config file and then refresh your page.

You should see the updater back on your browser. This looks like a bug.

Yup that took care of it and it finished successfully. Thanks for the help!