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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, 20.0.5): 25.0.1
Operating system and version (eg, Ubuntu 20.04): container of image linuxserver/nextcloud:latest
$ uname -r
4.4.180+
Apache or nginx version (eg, Apache 2.4.25): nginx/1.20.2
PHP version (eg, 7.4): 8.0.25
Host OS: DSM 7.1.1-42962 Update 1
Hardware platform: Synology DS918+ (CPU: Intel Celeron J3455)
The issue you are facing:
I have just reset NC a couple days ago. I have trouble setting the profile picture. It went well and the file was uploaded correctly and an edit widget was shown as below:
However, it failed after I have hit the button “Set as profile picture”. An error popped up as below:
Similar error appeared for setting favicon, except no edit widget needed. The error is show as below:
Everything else is fine so far so good. I didn’t have this problem on NC v.24.0.5.
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- open the profile page on NC
- click upload button on profile picture
- select a jpeg file and upload
- click on the button “Set as profile picture”
The output of your Nextcloud log in Admin > Logging:
{"reqId":"mVbVgy5qEip5iTnBQ05y","level":2,"time":"2022-11-12T14:39:17+00:00","remoteAddr":"192.168.64.5","user":"<omitted for security>","app":"core","method":"POST","url":"/avatar","message":"The file was only partially uploaded","userAgent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36","version":"25.0.1.1","data":{"app":"core"},"id":"636fb01bc238b"}
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'memcache.local' => '\\OC\\Memcache\\APCu',
'datadirectory' => '/data',
'instanceid' => '<omitted for security>',
'passwordsalt' => '<omitted for security>',
'secret' => '<omitted for security>',
'trusted_domains' =>
array (
0 => '<omitted for security>',
),
'dbtype' => 'mysql',
'version' => '25.0.1.1',
'trusted_proxies' =>
array (
0 => 'swag',
),
'overwrite.cli.url' => 'https://<omitted for security>',
'dbname' => 'nextcloud',
'dbhost' => 'mariadb:3306',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'ncuser',
'dbpassword' => '<omitted for security>',
'installed' => true,
'default_phone_region' => 'GB',
'memcache.distributed' => '\\OC\\Memcache\\Redis',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => 'redis',
'port' => 6379,
'timeout' => 1.5,
),
// image preview related
'preview_max_x' => null,
'preview_max_y' => null,
'jpeg_quality' => '60',
'preview_max_scale_factor' => 1.5,
'app_install_overwrite' =>
array (
0 => 'files_excludedirs',
),
'mail_smtpmode' => 'smtp',
'mail_smtpsecure' => 'tls',
'mail_sendmailmode' => 'smtp',
'mail_from_address' => '<omitted for security>',
'mail_domain' => '<omitted for security>',
'mail_smtpauthtype' => 'LOGIN',
'mail_smtpauth' => 1,
'mail_smtphost' => '<omitted for security>',
'mail_smtpport' => '587',
'mail_smtpname' => '<omitted for security>',
'mail_smtppassword' => '<omitted for security>',
);
The output of your Apache/nginx/system log in /var/log/____:
access.log
192.168.64.5 - - [12/Nov/2022:14:39:16 +0000] "POST /avatar HTTP/1.1" 400 0 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36"
192.168.64.5 - - [12/Nov/2022:14:39:17 +0000] "GET /avatar/<omitted for security>/64/dark?v=1668263956899 HTTP/1.1" 200 139 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36"
192.168.64.5 - - [12/Nov/2022:14:39:17 +0000] "GET /avatar/<omitted for security>/512/dark?v=1668263956899 HTTP/1.1" 200 536 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36"
Output errors in nextcloud.log in /var/www/ or as admin user in top right menu, filtering for errors. Use a pastebin service if necessary.
{"reqId":"mVbVgy5qEip5iTnBQ05y","level":2,"time":"2022-11-12T14:39:17+00:00","remoteAddr":"192.168.64.5","user":"janus","app":"core","method":"POST","url":"/avatar","message":"The file was only partially uploaded","userAgent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36","version":"25.0.1.1","data":{"app":"core"}}