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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, 29.0.5): 30.0.1.2
Operating system and version (eg, Ubuntu 24.04): Debian 12
Apache or nginx version (eg, Apache 2.4.25): nginx 1.22.1
PHP version (eg, 8.3): 8.2
The issue you are facing:
I had Nextcloud configured and working with Apache, but later decided to switch to nginx. When I did this, everything seemed to be working, but when I tried to use the Notes app or opened anything in the rich text editor, it simply didn’t load. After looking through the logs, it seemed like the settings folder for the rich text editor was completely missing. I’m not sure how to get it back.
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- Delete the apps/richdocuments/settings folder
The output of your Nextcloud log in Admin > Logging:
This was completely blank, my guess is it depends on the rich documents app.
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => 'redacted',
'passwordsalt' => 'redacted',
'secret' => 'redacted',
'trusted_domains' =>
array (
0 => 'nextcloud.dragin.xyz',
),
'datadirectory' => '/var/www/nextcloud-dragin/data',
'dbtype' => 'mysql',
'version' => '30.0.1.2',
'overwrite.cli.url' => 'https://nextcloud.dragin.xyz',
'htaccess.RewriteBase' => '/',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'nextcloud',
'dbpassword' => 'redacted',
'installed' => true,
'updater.secret' => 'redacted',
'maintenance' => false,
'theme' => '',
'loglevel' => 0,
);
The output of your Apache/nginx/system log in /var/log/____:
2024/11/05 18:09:00 [error] 600#600: *3148 connect() failed (111: Connection refused) while connecting to upstream, client: 136.62.202.57, server: nextcloud.dragin.xyz, request: "PUT /ocs/v2.php/apps/user_status/api/v1/heartbeat?format=json HTTP/2.0", upstream: "fastcgi://127.0.0.1:9000", host: "nextcloud.dragin.xyz"
2024/11/05 18:10:43 [error] 599#599: *3239 connect() failed (111: Connection refused) while connecting to upstream, client: 76.164.199.160, server: nextcloud.dragin.xyz, request: "GET /apps/richdocuments/settings/fonts.json HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "nextcloud.dragin.xyz"
2024/11/05 18:11:48 [error] 600#600: *3148 connect() failed (111: Connection refused) while connecting to upstream, client: 136.62.202.57, server: nextcloud.dragin.xyz, request: "GET /csrftoken HTTP/2.0", upstream: "fastcgi://127.0.0.1:9000", host: "nextcloud.dragin.xyz"
2024/11/05 18:12:53 [error] 600#600: *3148 connect() failed (111: Connection refused) while connecting to upstream, client: 136.62.202.57, server: nextcloud.dragin.xyz, request: "GET /settings/admin/serverinfo HTTP/2.0", upstream: "fastcgi://127.0.0.1:9000", host: "nextcloud.dragin.xyz"
2024/11/05 18:13:43 [error] 599#599: *3292 connect() failed (111: Connection refused) while connecting to upstream, client: 76.164.199.160, server: nextcloud.dragin.xyz, request: "GET /apps/richdocuments/settings/fonts.json HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "nextcloud.dragin.xyz"
2024/11/05 18:14:43 [error] 600#600: *3303 connect() failed (111: Connection refused) while connecting to upstream, client: 76.164.199.160, server: nextcloud.dragin.xyz, request: "GET /apps/richdocuments/settings/fonts.json HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "nextcloud.dragin.xyz"
2024/11/05 18:15:26 [error] 600#600: *3148 connect() failed (111: Connection refused) while connecting to upstream, client: 136.62.202.57, server: nextcloud.dragin.xyz, request: "GET /settings/apps HTTP/2.0", upstream: "fastcgi://127.0.0.1:9000", host: "nextcloud.dragin.xyz"
2024/11/05 18:15:43 [error] 600#600: *3332 connect() failed (111: Connection refused) while connecting to upstream, client: 76.164.199.160, server: nextcloud.dragin.xyz, request: "GET /apps/richdocuments/settings/fonts.json HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "nextcloud.dragin.xyz"
2024/11/05 18:16:15 [error] 600#600: *3148 connect() failed (111: Connection refused) while connecting to upstream, client: 136.62.202.57, server: nextcloud.dragin.xyz, request: "POST /settings/apps/disable HTTP/2.0", upstream: "fastcgi://127.0.0.1:9000", host: "nextcloud.dragin.xyz"
2024/11/05 18:17:44 [error] 600#600: *3418 connect() failed (111: Connection refused) while connecting to upstream, client: 76.164.199.160, server: nextcloud.dragin.xyz, request: "GET /apps/richdocuments/settings/fonts.json HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "nextcloud.dragin.xyz"
2024/11/05 18:19:01 [error] 600#600: *3423 connect() failed (111: Connection refused) while connecting to upstream, client: 136.62.202.57, server: nextcloud.dragin.xyz, request: "PUT /ocs/v2.php/apps/user_status/api/v1/heartbeat?format=json HTTP/2.0", upstream: "fastcgi://127.0.0.1:9000", host: "nextcloud.dragin.xyz"
2024/11/05 18:20:44 [error] 600#600: *3447 connect() failed (111: Connection refused) while connecting to upstream, client: 76.164.199.160, server: nextcloud.dragin.xyz, request: "GET /apps/richdocuments/settings/fonts.json HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "nextcloud.dragin.xyz"
2024/11/05 18:21:44 [error] 599#599: *3458 connect() failed (111: Connection refused) while connecting to upstream, client: 76.164.199.160, server: nextcloud.dragin.xyz, request: "GET /apps/richdocuments/settings/fonts.json HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "nextcloud.dragin.xyz"
2024/11/05 18:23:31 [error] 599#599: *3467 connect() failed (111: Connection refused) while connecting to upstream, client: 136.62.202.57, server: nextcloud.dragin.xyz, request: "PUT /ocs/v2.php/apps/user_status/api/v1/heartbeat?format=json HTTP/2.0", upstream: "fastcgi://127.0.0.1:9000", host: "nextcloud.dragin.xyz"
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.