Support intro
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):16.0.0.9
Operating system and version (eg, Ubuntu 17.04):18.04 LTS
Apache or nginx version (eg, Apache 2.4.25): 2.4.29
PHP version (eg, 7.1):7.2.17
The issue you are facing: When i log on via browser (ff,edge, ie) the page looks like it missing many items. the ones that i can identify are the list of Files, and the user icon on top right. all pages seem to be missing things although i cannot tell what they are … the formatting seems off.
if i check the webDAV interface, that is fine.
if i add a new file using the client webDAV, i can see it in my account by going to the server data/files.
How do i debug such a problem?
I have already done the chmod and chown per documentation.
Is this the first time you’ve seen this error? (Y/N):Y
Steps to replicate it: I don’t know
The output of your Nextcloud log in Admin > Logging:
"user":"fawzi","app":"webdav","method":"GET","url":"\/remote.php\/webdav\/Photos\/2019\/05\/19-05-04%2010-32-13%202817.jpg","message":{"Exception":"OCP\\Encryption\\Exceptions\\GenericEncryptionException","Message":"Bad Signature","Code":0,"Trace":[{"file":"\/var\/www\/nextcloud\/apps\/encryption\/lib\/Crypto\/Crypt.php","line":467,"function":"checkSignature","class":"OCA\\Encryption\\Crypto\\Crypt","type":"->","args":
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'updatechecker' => false,
'passwordsalt' => 'XXXXXXXXXXXXXXXX',
'secret' => 'XXXXXXXXXXXXXXXXXXXXXX',
'trusted_domains' =>
array (
0 => 'cloud.kdsplumbing.com',
1 => '192.168.1.169',
),
'datadirectory' => '/kdscloud',
'overwrite.cli.url' => 'http://localhost',
'dbtype' => 'mysql',
'version' => '16.0.0.9',
'dbname' => 'kdscloud',
'dbhost' => 'localhost',
'dbtableprefix' => 'oc_',
'dbuser' => 'oc_cldadm',
'dbpassword' => 'XXXXXXXXXXXXX',
'logtimezone' => 'America/Los_Angeles',
'installed' => true,
'instanceid' => 'ocyhqdqljbds',
'theme' => '',
'loglevel' => 0,
'maintenance' => false,
'mail_from_address' => 'admin',
'mail_smtpmode' => 'smtp',
'mail_smtpauthtype' => 'LOGIN',
'mail_domain' => 'kdsplumbing.com',
'mail_smtpauth' => 1,
'mail_smtphost' => '',
'mail_smtpport' => '465',
'mail_smtpname' => '',
'mail_smtppassword' => '',
'ldapIgnoreNamingRules' => false,
'ldapProviderFactory' => 'OCA\\User_LDAP\\LDAPProviderFactory',
'data-fingerprint' => 'XXXXXXXXXXXXXXXX',
'log_type' => 'file',
'logfile' => '/var/log/kdscloud.log',
'syslog_tag' => 'kdscloud',
);
The output of your Apache/nginx/system log in /var/log/____:
PASTE HERE