ownCloud file not found

Steps to reproduce

1.I find the necessary file
2.I download it
3.I receive an error: owncloud not found

Expected behaviour

The file should get to me on the PC

Actual behaviour

I receive an error: owncloud not found

Server configuration

Operating system:

Web server:
Server version: Apache/2.4.6 (CentOS)

mysql Ver 15.1 Distrib 5.5.60-MariaDB, for Linux (x86_64) using readline 5.1
PHP version:
PHP 7.1.26 (cli) (built: Jan 9 2019 08:02:33) ( NTS )

ownCloud version: (see ownCloud admin page)
Updated from an older ownCloud or fresh install:

Where did you install ownCloud from:

Signing status (ownCloud 9.0 and above):
versionstring 10.1.0

### /config.php
**The content of config/config.php:**
$CONFIG = array (
  'updatechecker' => false,
  'instanceid' => '*',
  'passwordsalt' => '*',
  'secret' => '*',
  'trusted_domains' =>
  array (
    0 => '*',
  'datadirectory' => '/owncloud_data/',
  'overwrite.cli.url' => '*',
  'dbtype' => 'mysql',
  'version' => '',
  'dbname' => '*',
  'dbhost' => 'localhost',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'owncloud',
  'dbpassword' => '*',
  'logtimezone' => 'UTC',
  'installed' => true,
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'filelocking.enabled' => true,
  'memcache.locking' => '\\OC\\Memcache\\Redis',
  'redis' =>
  array (
    'host' => 'localhost',
    'port' => 6379,
    'timeout' => 0.0,
    'password' => '',

###List of activated apps:
ls apps/
activity contacts federatedfilesharing files_sharing files_videoplayer notifications templateeditor
announcementcenter dav federation files_texteditor firstrunwizard provisioning_api updatenotification
brute_force_protection drawio files files_textviewer gallery richdocuments user_external
comments encryption files_external files_trashbin market sensorlogger wallpaper
configreport external files_pdfviewer files_versions notes systemtags

###Are you using external storage, if yes which one:
 //ip/sharecloud /owncloud_data/ cifs

##Are you using encryption:

### Client configuration
Browser and desktop application

##Operating system:
Windows 10

###Details which I noticed
I apologize but I have no other information any more. I noticed one feature. 
The file which did not manage to be found on the smb server is included in the trash bin folder. If to copy it the error vanishes in user data.