Getting 'PDF.js build: 228a591c Invalid PDF structure' only on files in a particular folder

[ttblum]

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Steps to reproduce

1. Under one particular publicly shared folder we are unable to view any PDF files, it results in the error:

Invalid or corrupted PDF file. Less Information
PDF.js v2.4.456 (build: 228a591c) Message: Invalid PDF structure.

All PDF files in all folders beneath this public share result in the same error message when clicked on.
Other types of files such as PNG open OK.

So far we are able to view PDF files in every other publicly shared folder, this happening on one folder only and all the folders beneath it. There are no special characters in the folder name.

2. This has already been reported here: https://ask.linuxmuster.net/t/nextcloud-update-auf-20-0-7-fehler-bei-pdf/6980/3

Expected behaviour

The PDF should be displayed within the browser

Actual behaviour

Error message:
Invalid or corrupted PDF file. Less Information
PDF.js v2.4.456 (build: 228a591c) Message: Invalid PDF structure.

Server configuration

Operating system:
Ubuntu 20.04.1 LTS

Web server:
apache2 2.4.41-4ubuntu3

Database:
mariadb-server-10.3 1:10.3.22-1ubuntu1

PHP version:
2:7.4+75

Nextcloud version: (see Nextcloud admin page)
20.0.7

Updated from an older Nextcloud/ownCloud or fresh install:
Auto-updated from 20.0.6

Where did you install Nextcloud from:
It auto-updated

Login as admin user into your Nextcloud and access 
http://example.com/index.php/settings/integrity/failed 
paste the results here.

No errors have been found.

List of activated apps:

App list

Accessibility 1.6.0 Featured Activity 2.13.4 Featured Collaborative tags 1.10.0 Featured Comments 1.10.0 Featured Contacts Interaction 1.1.0 Featured Dashboard 7.0.0 Featured Deleted files 1.10.1 Featured Federation 1.10.1 Featured File sharing 1.12.2 Featured First run wizard 2.9.0 Featured LDAP user and group backend 1.10.2 Featured Log Reader 2.5.0 Featured Monitoring 1.10.0 Featured Nextcloud announcements 1.9.0 Featured Notifications 2.8.0 Featured Password policy 1.10.1 Featured PDF viewer 2.0.1 Featured Photos 1.2.3 Featured Privacy 1.4.0 Featured Recommendations 0.8.0 Featured Right click 0.17.0 Featured Share by mail 1.10.0 Featured Support 1.3.0 Featured Text 3.1.0 Featured Theming 1.11.0 Featured Two-Factor Admin Support 3.0.0 Two-Factor TOTP Provider 5.0.0 Featured Two-Factor U2F 6.1.0 Featured Usage survey 1.8.0 Featured User status 1.0.1 Featured Versions 1.13.0 Featured Video player 1.9.0 Featured Weather status 1.0.0 ``` If you have access to your command line run e.g.: sudo -u www-data php occ app:list from within your Nextcloud installation folder ``` nextcloud.occ app:list Enabled: - accessibility: 1.6.0 - activity: 2.13.4 - cloud_federation_api: 1.3.0 - comments: 1.10.0 - contactsinteraction: 1.1.0 - dashboard: 7.0.0 - dav: 1.16.2 - federatedfilesharing: 1.10.2 - federation: 1.10.1 - files: 1.15.0 - files_pdfviewer: 2.0.1 - files_rightclick: 0.17.0 - files_sharing: 1.12.2 - files_trashbin: 1.10.1 - files_versions: 1.13.0 - files_videoplayer: 1.9.0 - firstrunwizard: 2.9.0 - logreader: 2.5.0 - lookup_server_connector: 1.8.0 - nextcloud_announcements: 1.9.0 - notifications: 2.8.0 - oauth2: 1.8.0 - password_policy: 1.10.1 - photos: 1.2.3 - privacy: 1.4.0 - provisioning_api: 1.10.0 - recommendations: 0.8.0 - serverinfo: 1.10.0 - settings: 1.2.0 - sharebymail: 1.10.0 - support: 1.3.0 - survey_client: 1.8.0 - systemtags: 1.10.0 - text: 3.1.0 - theming: 1.11.0 - twofactor_admin: 3.0.0 - twofactor_backupcodes: 1.9.0 - twofactor_totp: 5.0.0 - twofactor_u2f: 6.1.0 - user_ldap: 1.10.2 - user_status: 1.0.1 - viewer: 1.4.0 - weather_status: 1.0.0 - workflowengine: 2.2.0 Disabled: - admin_audit - encryption - files_external

Nextcloud configuration:

Config report

Running on Ubuntu in a Snap container ``` If you have access to your command line run e.g.: sudo -u www-data php occ config:list system from within your Nextcloud installation folder

nextcloud.occ config:list system
{
"system": {
"apps_paths": [
{
"path": "/snap/nextcloud/current/htdocs/apps",
"url": "/apps",
"writable": false
},
{
"path": "/var/snap/nextcloud/current/nextcloud/extra-apps",
"url": "/extra-apps",
"writable": true
}
],
"supportedDatabases": [
"mysql"
],
"memcache.locking": "\OC\Memcache\Redis",
"memcache.local": "\OC\Memcache\Redis",
"redis": {
"host": "REMOVED SENSITIVE VALUE",
"port": 0
},
"instanceid": "REMOVED SENSITIVE VALUE",
"passwordsalt": "REMOVED SENSITIVE VALUE",
"secret": "REMOVED SENSITIVE VALUE",
"trusted_domains": [
"FQDN"
],
"datadirectory": "REMOVED SENSITIVE VALUE",
"dbtype": "mysql",
"version": "20.0.7.1",
"overwrite.cli.url": "https://FQDN",
"dbname": "REMOVED SENSITIVE VALUE",
"dbhost": "REMOVED SENSITIVE VALUE",
"dbport": "",
"dbtableprefix": "oc_",
"mysql.utf8mb4": true,
"dbuser": "REMOVED SENSITIVE VALUE",
"dbpassword": "REMOVED SENSITIVE VALUE",
"installed": true,
"ldapIgnoreNamingRules": false,
"ldapProviderFactory": "OCA\User_LDAP\LDAPProviderFactory",
"loglevel": 2,
"maintenance": false,
"mail_from_address": "REMOVED SENSITIVE VALUE",
"mail_smtpmode": "smtp",
"mail_sendmailmode": "smtp",
"mail_domain": "REMOVED SENSITIVE VALUE",
"mail_smtphost": "REMOVED SENSITIVE VALUE",
"mail_smtpport": "587",
"mail_smtpsecure": "tls",
"mail_smtpauthtype": "NTLM",
"theme": "",
"mail_smtpauth": 1,
"mail_smtpname": "REMOVED SENSITIVE VALUE",
"mail_smtppassword": "REMOVED SENSITIVE VALUE"
}
}

</details>

**Are you using external storage, if yes which one:** local/smb/sftp/...
no

**Are you using encryption:** yes/no
no

**Are you using an external user-backend, if yes which one:** LDAP/ActiveDirectory/Webdav/...
LDAP
#### LDAP configuration (delete this part if not used)
<details>
<summary>LDAP config</summary>

Client configuration

Browser:
Chrome

Operating system:
Windows 10

Logs

apache_access.log and apache_errs.log don't show any errors that I can find

[kesselb]

Duplicate of nextcloud/files_pdfviewer#286