No user is selected for sharing

good afternoon friends. Help solve the problem. After an unsuccessful update, namely when you entered the command sudo -u www-data php /var/www/html/owncloud/occ db:convert-mysql-charset


I decided to launch the cloud.
But now, when I choose to share, I cannot select a user. Although he is

I could not find information about this.
I entered commands

sudo -u www-data /var/www/html/owncloud/occ maintenance:mode --on
sudo -u www-data /var/www/html/owncloud/occ config:system:set mysql.utf8mb4 --type boolean --value="false"
sudo -u www-data /var/www/html/owncloud/occ upgrade
sudo -u www-data /var/www/html/owncloud/occ config:system:set mysql.utf8mb4 --type boolean --value="true"
sudo -u www-data /var/www/html/owncloud/occ db:convert-mysql-charset
sudo -u www-data /var/www/html/owncloud/occ maintenance:mode --off

Steps to reproduce

sudo -u www-data /var/www/html/owncloud/occ maintenance:mode --on
sudo -u www-data /var/www/html/owncloud/occ config:system:set mysql.utf8mb4 --type boolean --value="false"
sudo -u www-data /var/www/html/owncloud/occ upgrade
sudo -u www-data /var/www/html/owncloud/occ config:system:set mysql.utf8mb4 --type boolean --value="true"
sudo -u www-data /var/www/html/owncloud/occ db:convert-mysql-charset
sudo -u www-data /var/www/html/owncloud/occ maintenance:mode --off

Expected behaviour

Update should occur

Actual behaviour

unable to select users to share

Server configuration

OS - Ubuntu 16.04 LTS

WebServer - Nginx 1.10

DataBase - MySQL

PHP - 7.0 With all the necessary connected modules

ownCloud 9.1.8 update to 10.1

Config.php

   <?php
$CONFIG = array (
  'instanceid' => 'ocangwbuekt2',
  'passwordsalt' => 'xxx',
  'secret' => 'xxx',
  'trusted_domains' => 
  array (
    0 => '192.168.12.137',
    1 => '92.**.**.83',
    2 => 'mail.***-***.ml',
    3 => '***-***.ml',
    4 => '***-***.cloud',
  ),
  'datadirectory' => '/var/www/html/owncloud/data',
  'overwrite.cli.url' => 'http://mail.***-***.ml/owncloud',
  'dbtype' => 'mysql',
  'version' => '10.1.0.4',
  'dbname' => 'owncloud',
  'dbhost' => 'localhost',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'oc_admin4',
  'dbpassword' => 'xxx',
  'logtimezone' => 'UTC',
  'installed' => true,
  'mysql.utf8mb4' => true,
  'maintenance' => true,
  'files_external_allow_create_new_local' => 'true',
  'xframe_restriction' => false,
  'loglevel' => 2,
);

App List
Enabled:

  • comments: 0.3.0
  • configreport: 0.1.1
  • dav: 0.4.0
  • external: 1.2.1
  • federatedfilesharing: 0.3.0
  • federation: 0.1.0
  • files: 1.5.1
  • files_external: 0.7.1
  • files_sharing: 0.11.0
  • files_trashbin: 0.9.0
  • files_versions: 1.3.0
  • files_videoplayer: 0.9.8
  • firstrunwizard: 1.1
  • market: 0.3.0
  • notifications: 0.4.1
  • provisioning_api: 0.5.0
  • systemtags: 0.3.0
  • updatenotification: 0.2.1
    Disabled:
  • encryption
  • user_external

Are you using external storage, if yes which one: YES sftp

**Are you using an external user-backend, if yes which one:**NO

Client configuration

Google Chrome

Operating system: Windows 7\10

Logs

Web server error log

https://csharping.info/error/ng.error.log

ownCloud log (data/owncloud.log)

https://csharping.info/error/owncloud.log