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Sorry to hear you’re facing problems 
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In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
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, 12.0.2):
Operating system and version (eg, Ubuntu 17.04):
Apache or nginx version (eg, Apache 2.4.25):
PHP version (eg, 7.1):
The issue you are facing:
Is this the first time you’ve seen this error? (Y/N):
Steps to replicate it:
- Share a folder that contains files and subfolders with “Allows Uploading and Editing” checked
- Open shared folder via copied or emailed link
- Contents of the subfolders are not visible. “Download all files” creates a .zip with the folder structure as expected; they are jut not visible within the webrowser.
The output of your Nextcloud log in Admin > Logging:
Nothing shown.
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => '',
'passwordsalt' => '',
'secret' => '',
'trusted_domains' =>
array (
0 => 'share.domain.com',
),
'datadirectory' => '/var/nextcloud/data',
'dbtype' => 'mysql',
'version' => '15.0.6.1',
'overwrite.cli.url' => 'https://share.domain.com/nextcloud',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'a user',
'dbpassword' => 'a password',
'installed' => true,
'memcache.local' => '\\OC\\Memcache\\Redis',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'filelocking.enabled' => 'true',
'redis' =>
array (
'host' => '/var/run/redis/redis-server.sock',
'port' => 0,
'timeout' => 0.0,
),
'htaccess.RewriteBase' => '/nextcloud',
'mail_from_address' => 'mail user',
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_domain' => 'mailserver.net',
'mail_smtphost' => '10.110.1.4',
'mail_smtpport' => '25',
'remember_login_cookie_lifetime' => 0,
'session_lifetime' => 600,
'session_keepalive' => false,
'skeletondirectory' => '/var/nextcloud/data/custskeleton',
'ldapIgnoreNamingRules' => false,
'ldapProviderFactory' => 'OCA\\User_LDAP\\LDAPProviderFactory',
'twofactor_enforced' => 'true',
'twofactor_enforced_groups' =>
array (
),
'twofactor_enforced_excluded_groups' =>
array (
0 => 'group1',
1 => 'group2',
),
);
As shown in the picture this is the contents of the folder that was shared. I am unable to see the contents in the browser for either “New Folder” or “Test”. Multiple browsers, Desktop and Mobile, have been tested.
