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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:
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Or for longer, use three backticks above and below the code snippet:
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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 (13.0.5):
Operating system and version (Debian Stretch):
Apache or nginx version (Ngnix 1.10.3):
PHP version (7.0):
The issue you are facing:
I tried to disable server-side encrypt feature and became unable to access my files.
Is this the first time you’ve seen this error? (Y):
Steps to replicate it:
- Disabled encrypt app from web admin interface
- Disabled server-side encryption via “occ encryption:disable”
- Tried to decrypt files via "occ encryption:decrypt-all "
- After many hours I get “all files could be decrypted successfully!” but can’t access my files, they seem to be encrypted. This is the log message: “Can not decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you.” I’m the owner of the files, they were not shared by another user.
The output of your Nextcloud log in Admin > Logging:
Error PHP Uncaught Error: Access to undeclared static property: OC\Files\Filesystem::$normalizedPathCache in /var/www/html/nextcloud.old/lib/private/Files/Filesystem.php:796 Stack trace: #0 /var/www/html/nextcloud.old/lib/private/Files/View.php(2055): OC\Files\Filesystem::normalizePath('/tvaz/files/Sha...') #1 /var/www/html/nextcloud.old/lib/private/Files/View.php(1182): OC\Files\View->unlockFile('/Shared/Vanier/...', 1) #2 [internal function]: OC\Files\View->OC\Files\{closure}() #3 /var/www/html/nextcloud.old/3rdparty/icewind/streams/src/CallbackWrapper.php(109): call_user_func(Object(Closure)) #4 [internal function]: Icewind\Streams\CallbackWrapper->stream_close() #5 {main} thrown at /var/www/html/nextcloud.old/lib/private/Files/Filesystem.php#796 2019-03-13T22:59:17-0400
Error no app in context Can not decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you. 2019-03-13T22:59:09-0400
Error no app in context Can not decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you. 2019-03-13T22:59:06-0400
Fatal webdav OC\Encryption\Exceptions\DecryptionFailedException: Can not decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you. 2019-03-13T22:59:03-0400
Error no app in context Can not decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you. 2019-03-13T22:59:03-0400
Error no app in context Can not decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you. 2019-03-13T22:59:01-0400
Error PHP Uncaught Error: Access to undeclared static property: OC\Files\Filesystem::$normalizedPathCache in /var/www/html/nextcloud.old/lib/private/Files/Filesystem.php:796 Stack trace: #0 /var/www/html/nextcloud.old/lib/private/Files/View.php(2055): OC\Files\Filesystem::normalizePath('/tvaz/files/Sha...') #1 /var/www/html/nextcloud.old/lib/private/Files/View.php(1182): OC\Files\View->unlockFile('/Shared/Vanier/...', 1) #2 [internal function]: OC\Files\View->OC\Files\{closure}() #3 /var/www/html/nextcloud.old/3rdparty/icewind/streams/src/CallbackWrapper.php(109): call_user_func(Object(Closure)) #4 [internal function]: Icewind\Streams\CallbackWrapper->stream_close() #5 {main} thrown at /var/www/html/nextcloud.old/lib/private/Files/Filesystem.php#796 2019-03-13T22:58:58-0400
Fatal webdav OC\Encryption\Exceptions\DecryptionFailedException: Can not decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you. 2019-03-13T22:58:50-0400
Error no app in context Can not decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you. 2019-03-13T22:58:50-0400
Error no app in context Can not decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you.
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'debug' => true,
'instanceid' => 'XXXXXXXXX',
'passwordsalt' => 'XXXXXXXXXXXXX',
'secret' => 'XXXXXXXXXXXXXX',
'trusted_domains' =>
array (
0 => 'XXXXXXXXXX',
),
'datadirectory' => '/var/www/html/nextcloud.old/data',
'overwrite.cli.url' => 'https://XXXXXXX',
'dbtype' => 'mysql',
'version' => '13.0.5.2',
'dbname' => 'XXXXXXXX',
'dbhost' => 'XXXXXX',
'dbport' => '',
'dbtableprefix' => 'oc_',
'dbuser' => 'XXXXXX',
'dbpassword' => 'XXXXXXXXX',
'installed' => true,
'maintenance' => false,
'theme' => '',
'loglevel' => 2,
);
The output of your Apache/nginx/system log in /var/log/____:
2019/03/14 02:59:03 [error] 4056#4056: *2246 FastCGI sent in stderr: ")
#1 /var/www/html/nextcloud.old/lib/private/Files/View.php(1182): OC\Files\View->unlockFile('/Shared/Vanier/...', 1)
#2 [internal function]: OC\Files\View->OC\Files\{closure}()
#3 /var/www/html/nextcloud.old/3rdparty/icewind/streams/src/CallbackWrapper.php(109): call_user_func(Object(Closure))
#4 [internal function]: Icewind\Streams\CallbackWrapper->stream_close()
#5 {main}
thrown in /var/www/html/nextcloud.old/lib/private/Files/Filesystem.php on line 796" while reading upstream, client: 172.XXXX, server: XXXXX, request: "GET /remote.php/webdav/Shared/XXXX/Teaching/Java/java_chapter7.pdf HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "XXXXX", referrer: "https://XXXXX/apps/files_pdfviewer/?file=%2Fremote.php%2Fwebdav%2FShared%2FVanier%2FTeaching%2FJava%2Fjava_chapter7.pdf"
