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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:
Cannot upload files using WebUI in nextcloud.
I am using a shared hosting provided by Hostgator and suddenly, file upload is not working using web ui. The desktop app uploads properly.
I tried installing owncloud using softaculous and the same problem occurs in a fresh installation as well.
Is this the first time you’ve seen this error? (Y/N):
Yes
Steps to replicate it:
- Login
- Upload a file by clicking + or drag and drop
The output of your Nextcloud log in Admin > Logging:
No Log for this process but the last error in the log is
Fatal webdav Sabre\DAV\Exception\BadRequest: Document is empty on line 1, column 1
[internal function] Sabre\DAV\CorePlugin->httpPropFind(Object(Sabre\HTTP\Request), Object(Sabre\HTTP\Response))
/home/agarwegg/public_html/files/3rdparty/sabre/event/lib/EventEmitterTrait.php - line 105: call_user_func_array(Array, Array)
/home/agarwegg/public_html/files/3rdparty/sabre/dav/lib/DAV/Server.php - line 479: Sabre\Event\EventEmitter->emit('method PROPFIND', Array)
/home/agarwegg/public_html/files/3rdparty/sabre/dav/lib/DAV/Server.php - line 254: Sabre\DAV\Server->invokeMethod(Object(Sabre\HTTP\Request), Object(Sabre\HTTP\Response))
/home/agarwegg/public_html/files/apps/dav/lib/Server.php - line 287: Sabre\DAV\Server->exec()
/home/agarwegg/public_html/files/apps/dav/appinfo/v2/remote.php - line 35: OCA\DAV\Server->exec()
/home/agarwegg/public_html/files/remote.php - line 164: require_once('/home/agarwegg/...')
{main}
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => 'xx',
'passwordsalt' => 'xxx',
'secret' => 'xxx',
'trusted_domains' =>
array (
0 => 'www.com',
),
'datadirectory' => '/xx/nextclouddata',
'overwrite.cli.url' => 'xx/files',
'dbtype' => 'mysql',
'version' => '13.0.5.2',
'dbname' => 'xx',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'dbuser' => 'axx21',
'dbpassword' => 'xx',
'installed' => true,
'maintenance' => false,
'theme' => '',
'loglevel' => 2,
'memcache.local' => '\\OC\\Memcache\\APCu',
'app.mail.accounts.default' =>
array (
'email' => '%USERID%@axx.com',
'imapHost' => 'XX.com',
'imapPort' => 993,
'imapSslMode' => 'ssl',
'smtpHost' => 'XXcom',
'smtpPort' => 465,
'smtpSslMode' => 'ssl',
),
'mail_smtpmode' => 'smtp',
'mail_smtpauthtype' => 'LOGIN',
'mail_from_address' => 'admin',
'mail_domain' => 'XX',
'mail_smtpauth' => 1,
'mail_smtphost' => 'XX',
'mail_smtpport' => '465',
'mail_smtpsecure' => 'ssl',
'mail_smtpname' => 'XX',
'mail_smtppassword' => 'XX',
);
The output of your Apache/nginx/system log in /var/log/____:
Cannot find it