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Sorry to hear you’re facing problems 
help.nextcloud.com is for home/non-enterprise users. If you’re running a business, paid support can be accessed via portal.nextcloud.com where we can ensure your business keeps running smoothly.
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): 24.0.5.1
Operating system and version (eg, Ubuntu 20.04): fpm-alpine docker
Apache or nginx version (eg, Apache 2.4.25): nginx_1.22.0
PHP version (eg, 7.4): 8.0.23
The issue you are facing:
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- Activate in S3 policy only SSL traffic (over HTTPS only) allowed
The output of your Nextcloud log in Admin > Logging:
Exception: Creation of bucket "bucket" failed. Error executing "CreateBucket" on "http://BUCKET.s3.eu-central-1.amazonaws.com/"; AWS HTTP error: Client error: `PUT http://BUCKET.s3.eu-central-1.amazonaws.com/` resulted in a `403 Forbidden` response: <?xml version="1.0" encoding="UTF-8"?> <Error><Code>AccessDenied</Code><Message>Access Denied</Message><RequestId>YKTJQK (truncated...) AccessDenied (client): Access Denied - <?xml version="1.0" encoding="UTF-8"?> <Error><Code>AccessDenied</Code><Message>Access Denied</Message><RequestId>request</RequestId><HostId>HostID</HostId></Error>
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',
'apps_paths' =>
array (
0 =>
array (
'path' => '/var/www/html/apps',
'url' => '/apps',
'writable' => false,
),
1 =>
array (
'path' => '/var/www/html/custom_apps',
'url' => '/custom_apps',
'writable' => true,
),
),
'memcache.distributed' => '\\OC\\Memcache\\Redis',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => 'HOST',
'password' => '',
'port' => 6379,
),
'overwriteprotocol' => 'https',
'objectstore' =>
array (
'class' => '\\OC\\Files\\ObjectStore\\S3',
'arguments' =>
array (
'bucket' => 'BUCKET',
'key' => 'KEY',
'secret' => 'SECRET',
'region' => 'eu-central-1',
'hostname' => '',
'port' => '',
'objectPrefix' => 'urn:oid:',
'autocreate' => false,
'use_ssl' => true,
'use_path_style' => false,
'legacy_auth' => false,
),
),
'passwordsalt' => 'PASS',
'secret' => 'SECRET',
'trusted_domains' =>
array (
0 => 'localhost',
1 => 'NAME',
2 => 'NAME2',
),
'datadirectory' => '/var/www/html/data',
'dbtype' => 'pgsql',
'version' => '24.0.5.1',
'overwrite.cli.url' => 'https://localhost',
'dbname' => 'nextcloud',
'dbhost' => 'nextcloud-BLASH.eu-central-1.rds.amazonaws.com',
'dbport' => '',
'dbtableprefix' => 'oc_',
'dbuser' => 'USER',
'dbpassword' => 'PASS',
'installed' => true,
'instanceid' => 'INST',
);
The output of your Apache/nginx/system log in /var/log/____:
[error] 31#31: *8 upstream prematurely closed FastCGI request while reading upstream, client: IP, server: SERVER, request: "GET /css/notifications/AAAA-AAAA-styles.css?v=RANDOM HTTP/1.1", upstream: "fastcgi://IP:9000", host: "HOST"
PASTE HERE
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.
PASTE HERE