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Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): 19.0.10
Operating system and version (eg, Ubuntu 20.04): CentOS7
Apache or nginx version (eg, Apache 2.4.25): Apache/2.4.6 (CentOS)
PHP version (eg, 7.4): PHP 7.4.16
The issue you are facing:
I have successfully run the update from NC 18 to 19 via CLI, but the next upgrade from 19 to 20 fails at the ‘delete old files’ step.
I have read a number of posts and also recalled from a past upgrade issue that ownership in the HTTP folder can be an issue, but I have checked this and recursively adapted all ownerships to the apache user, but the issue remains. I have run the upgrade now 3 times, but it is stuck at the same point (it was stuck at the same step, but a different file (robots.txt) before, which I deleted and then it moved to this one.
Any help highly Dieser Text wird ausgeblendetappreciated!
From my perspective all rights and owners of the files in question look fine:
[root@11no updater]# sudo -u apache /usr/bin/php updater.phar
Nextcloud Updater - version: v19.0.3-8-gbfdc40b
Current version is 19.0.10.
Update to Nextcloud 20.0.9 available. (channel: "stable")
Following file will be downloaded automatically: https://download.nextcloud.com/server/releases/nextcloud-20.0.9.zip
Open changelog ↗
Steps that will be executed:
[ ] Check for expected files
[ ] Check for write permissions
[ ] Create backup
[ ] Downloading
[ ] Verify integrity
[ ] Extracting
[ ] Enable maintenance mode
[ ] Replace entry points
[ ] Delete old files
[ ] Move new files in place
[ ] Done
Start update? [y/N] y
Info: Pressing Ctrl-C will finish the currently running step and then stops the updater.
[✔] Check for expected files
[✔] Check for write permissions
[✔] Create backup
[✔] Downloading
[✔] Verify integrity
[✔] Extracting
[✔] Enable maintenance mode
[✔] Replace entry points
[ ] Delete old files ...PHP Warning: unlink(/var/www/html/updater/../console.php): Permission denied in phar:///var/www/html/updater/updater.phar/lib/Updater.php on line 866
[✘] Delete old files failed
Could not unlink: /var/www/html/updater/../console.php
Update failed. To resume or retry just execute the updater again.
[root@11no updater]# cd ..
[root@11no html]# ls -l
insgesamt 140
drwxr-xr-x 41 apache apache 4096 26. Apr 16:54 **3rdparty**
drwxr-xr-x 8 apache apache 4096 26. Apr 20:46 **apps**
-rw-r--r-- 1 apache apache 16522 8. Apr 13:18 AUTHORS
drwxr-xr-x 3 apache apache 4096 26. Apr 20:46 **config**
-rw-r--r-- 1 apache apache 3967 8. Apr 13:18 console.php
-rw-r--r-- 1 apache apache 34520 8. Apr 13:18 COPYING
drwxr-xr-x 23 apache apache 4096 26. Apr 16:54 **core**
-rw-r--r-- 1 apache apache 5140 8. Apr 13:18 cron.php
drwxr-x--- 9 apache apache 4096 26. Apr 15:21 **data**
-rw-r--r-- 1 apache apache 156 8. Apr 13:18 index.html
-rw-r--r-- 1 apache apache 57 28. Apr 20:01 index.php
drwxr-xr-x 6 apache apache 4096 26. Apr 16:54 **lib**
-rwxr-xr-x 1 apache apache 283 8. Apr 13:18 **occ**
drwxr-xr-x 2 apache apache 4096 26. Apr 16:54 **ocm-provider**
drwxr-xr-x 2 apache apache 4096 26. Apr 16:54 **ocs**
drwxr-xr-x 2 apache apache 4096 26. Apr 16:54 **ocs-provider**
-rw-r--r-- 1 apache apache 57 28. Apr 20:01 public.php
-rw-r--r-- 1 apache apache 57 28. Apr 20:01 remote.php
-rw-r--r-- 1 apache apache 57 28. Apr 20:01 status.php
drwxr-xr-x 3 apache apache 4096 26. Apr 20:46 **themes**
drwxr-xr-x 3 apache apache 4096 27. Apr 08:20 **updater**
-rw-r--r-- 1 apache apache 364 8. Apr 13:20 version.php
[root@11no html]# cd updater/
[root@11no updater]# ls -l
insgesamt 660
-rw-r--r-- 1 apache apache 66296 8. Apr 13:18 index.php
drwxr-x--- 2 apache apache 4096 27. Aug 2020 **updater**
-rw-r--r-- 1 apache apache 600602 8. Apr 13:18 updater.phar
Is this the first time you’ve seen this error? Y
Steps to replicate it:
- Run upgrade from CLI
The output of your Nextcloud log in Admin > Logging:
Nextcloud is down
Output of Updater.log:
2021-04-28T20:01:26+0000 IdL4mweIuL [info] executeStep request for step "9"
2021-04-28T20:01:26+0000 IdL4mweIuL [info] startStep("9")
2021-04-28T20:01:26+0000 IdL4mweIuL [info] deleteOldFiles()
2021-04-28T20:01:26+0000 IdL4mweIuL [error] executeStep request failed with other exception
2021-04-28T20:01:26+0000 IdL4mweIuL [error] Exception: Exception
Message: Could not unlink: /var/www/html/updater/../console.php
Code:0
Trace:
#0 phar:///var/www/html/updater/updater.phar/lib/UpdateCommand.php(381): NC\Updater\Updater->deleteOldFiles()
#1 phar:///var/www/html/updater/updater.phar/lib/UpdateCommand.php(233): NC\Updater\UpdateCommand->executeStep(9)
#2 phar:///var/www/html/updater/updater.phar/vendor/symfony/console/Command/Command.php(256): NC\Updater\UpdateCommand->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component
\Console\Output\ConsoleOutput))
#3 phar:///var/www/html/updater/updater.phar/vendor/symfony/console/Application.php(820): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\
Component\Console\Output\ConsoleOutput))
#4 phar:///var/www/html/updater/updater.phar/vendor/symfony/console/Application.php(187): Symfony\Component\Console\Application->doRunCommand(Object(NC\Updater\UpdateCommand), Object(Symfony\Component\Co
nsole\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#5 phar:///var/www/html/updater/updater.phar/vendor/symfony/console/Application.php(118): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Co
mponent\Console\Output\ConsoleOutput))
#6 phar:///var/www/html/updater/updater.phar/updater.php(10): Symfony\Component\Console\Application->run()
#7 /var/www/html/updater/updater.phar(10): require('phar:///var/www...')
#8 {main}
File:phar:///var/www/html/updater/updater.phar/lib/Updater.php
Line:868
2021-04-28T20:01:26+0000 IdL4mweIuL [info] rollbackChanges("9")
2021-04-28T20:01:26+0000 IdL4mweIuL [info] unlink .step
2021-04-28T20:01:26+0000 IdL4mweIuL [info] rollbackChanges - step >= 7
2021-04-28T20:01:26+0000 IdL4mweIuL [info] end of rollbackChanges()
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 => '11no....',
),
'datadirectory' => '/var/www/html/data',
'overwrite.cli.url' => 'http://11no....',
'dbtype' => 'mysql',
'version' => '19.0.10.1',
'installed' => true,
'maintenance' => true,
'theme' => '',
'loglevel' => 0,
'filelocking.enabled' => false,
'dbname' => 'nextcloud',
'dbhost' => '127.0.0.1',
'dbuser' => '',
'dbpassword' => '',
'mysql.utf8mb4' => true,
);
The output of your Apache/nginx/system log in /var/log/____:
Not sure where to find this in my setup