Steps to reproduce

This script is intended to repair data in ownCloud 8.2.1 data before upgrade to Nextcloud 9.0.54.
Script was written by Nextcloud member @nickvergessen as a result of incident postings #297 and #1669.

1. Placed script in owncloud (renamed from nextcloud) directory.
2. Created new ownCloud database.
3. Restored database from backups.
4. From command-line ran php repair-appconfig.php
5. Fatal PHP error raised while script was running

Expected behaviour

Completion of PHP script with no fatal errors.

Actual behaviour

Tell us what happens instead

Fixing missing records for app: systemtagsPHP Fatal error: Call to undefined method OC_App::registerAutoloading() in /var/www/html/owncloud/repair-appconfig.php on line 59

Please see previous two referenced incident postings at beginning of this incident.

Server configuration

Operating system:

Web server:

Database:

PHP version:

Nextcloud version: (see Nextcloud admin page)

Updated from an older Nextcloud/ownCloud or fresh install:

Where did you install Nextcloud from:

Signing status:

Login as admin user into your Nextcloud and access 
http://example.com/index.php/settings/integrity/failed 
paste the results here.

List of activated apps:

If you have access to your command line run e.g.:
sudo -u www-data php occ app:list
from within your Nextcloud installation folder

The content of config/config.php:

If you have access to your command line run e.g.:
sudo -u www-data php occ config:list system
from within your Nextcloud installation folder

or 

Insert your config.php content here
(Without the database password, passwordsalt and secret)

Are you using external storage, if yes which one: local/smb/sftp/...

Are you using encryption: yes/no

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...

LDAP configuration (delete this part if not used)

With access to your command line run e.g.:
sudo -u www-data php occ ldap:show-config
from within your Nextcloud installation folder

Without access to your command line download the data/owncloud.db to your local
computer or access your SQL server remotely and run the select query:
SELECT * FROM `oc_appconfig` WHERE `appid` = 'user_ldap';


Eventually replace sensitive data as the name/IP-address of your LDAP server or groups.

Browser:

Operating system:

Logs

Web server error log

Insert your webserver log here

Insert your Nextcloud log here

Insert your browser log here, this could for example include:

a) The javascript console log
b) The network log
c) ...