[Solved] Help! Help! Update failed with Drush 8.1.16 from Drupal 8.6.7 to Drupal 8.6.10.

Executed command:

php drush.phar up --security-only

File system before (looked at another machine):

total 4776
drwxr-xr-x  8 root root    4096 Feb 21 09:37 ./
drwxr-xr-x  3 root root    4096 Oct  8 13:04 ../
-rw-r--r--  1 root root     262 Jan 17 00:30 autoload.php
-rw-r--r--  1 root root    2770 Jan 17 00:30 composer.json
-rw-r--r--  1 root root  165142 Jan 17 00:30 composer.lock
drwxr-xr-x 12 root root    4096 Jan 17 00:30 core/
-rw-r--r--  1 root root    1025 Jan 17 00:30 .csslintrc
-rwxrwxrwx  1 root root 4591138 May 23  2018 drush.phar*
-rw-r--r--  1 root root     357 Jan 17 00:30 .editorconfig
-rw-r--r--  1 root root     151 Jan 17 00:30 .eslintignore
-rw-r--r--  1 root root      41 Jan 17 00:30 .eslintrc.json
-rw-r--r--  1 root root    1507 Jan 17 00:30 example.gitignore
-rw-r--r--  1 root root    3858 Jan 17 00:30 .gitattributes
-rw-r--r--  1 root root    7866 Jan 17 00:30 .htaccess
-rw-r--r--  1 root root    2314 Jan 17 00:30 .ht.router.php
-rw-r--r--  1 root root     549 Jan 17 00:30 index.php
-rw-r--r--  1 root root      95 Jan 17 00:30 INSTALL.txt
-rw-r--r--  1 root root   18092 Nov 17  2016 LICENSE.txt
drwxr-xr-x  7 root root    4096 Jan 18 14:48 modules/
drwxr-xr-x  2 root root    4096 Sep 10 11:50 profiles/
-rw-r--r--  1 root root    5889 Jan 17 00:30 README.txt
-rw-r--r--  1 root root    1594 Jan 17 00:30 robots.txt
drwxr-xr-x  3 root root    4096 Sep 10 11:50 sites/
drwxr-xr-x  2 root root    4096 Sep 10 11:50 themes/
-rw-r--r--  1 root root     848 Jan 17 00:30 update.php
drwxr-xr-x 18 root root    4096 Jan 17 00:44 vendor/
-rw-r--r--  1 root root    4555 Jan 17 00:30 web.config

After:

ll
total 28
drwxr-xr-x 7 www-data www-data 4096 Feb 21 09:11 ./
drwxr-xr-x 3 root     root     4096 Apr 30  2018 ../
drwxr-xr-x 4 root     root     4096 Feb 21 09:11 drupal-8.6.10/
drwxr-xr-x 4 www-data www-data 4096 Oct 16  2017 modules/
drwxr-xr-x 2 www-data www-data 4096 Oct  4  2017 profiles/
drwxr-xr-x 3 www-data www-data 4096 Oct  4  2017 sites/
drwxr-xr-x 2 www-data www-data 4096 Oct  4  2017 themes/

Worst of all, I didn’t copy the error message. Can you help me?

Drupal version: 


Source: https://www.drupal.org/taxonomy/term/21/feed