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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
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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): Nextcloud
Operating system and version (eg, Ubuntu 20.04): Raspberry Pi OS
Apache or nginx version (eg, Apache 2.4.25): N/A
PHP version (eg, 7.4): N/A
The issue you are facing:
It says my ip is an untrusted domain even though in /data/nextcloud/config/config.php i have made it a trusted domain
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
-
Run docker run
-d -p 4443:4443 -p 443:443 -p 80:80 -v ncdata:/data --name nextcloudpi ownyourbits/nextcloudpi $DOMAINin a terminal to create a docker container -
Try to connect using the pi’s ip (mine is static) via a web browser
The output of your Nextcloud log in Admin > Logging:
stopping logs...
Cannot load Zend OPcache - it was already loaded
stopping Cron...
cron: no process found
Cannot load Zend OPcache - it was already loaded
Stopping apache
Stopping PHP-fpm
Stopping mariaDB
LAMP cleanup complete
Cannot load Zend OPcache - it was already loaded
Cannot load Zend OPcache - it was already loaded
Cannot load Zend OPcache - it was already loaded
Starting PHP-fpm
Cannot load Zend OPcache - it was already loaded
Starting Apache
Starting mariaDB
2021-11-13 22:19:22 0 [Note] mysqld (mysqld 10.3.31-MariaDB-0+deb10u1) starting as process 109 ...
Cannot load Zend OPcache - it was already loaded
Starting Redis
Starting Cron
Starting Postfix
Provisioning
Cannot load Zend OPcache - it was already loaded
Provisioning Redis password
Updating NextCloud config with Redis password
Provisioning MariaDB password
Updating NextCloud config with MariaDB password
Cannot load Zend OPcache - it was already loaded
Running nc-limits
Cannot load Zend OPcache - it was already loaded
Using 3018900480B for PHP
Using 6 PHP threads
Using 955968512 memory for the database
Stopping redis-server: redis-server.
Starting redis-server: redis-server.
Starting notify_push daemon
Configuring Domain
Cannot load Zend OPcache - it was already loaded
Cannot load Zend OPcache - it was already loaded
System config value trusted_domains => 11 set to string 86.174.182.217
Cannot load Zend OPcache - it was already loaded
System config value trusted_domains => 1 set to string 172.17.0.3
Cannot load Zend OPcache - it was already loaded
Cannot load Zend OPcache - it was already loaded
Cannot load Zend OPcache - it was already loaded
Cannot load Zend OPcache - it was already loaded
Cannot load Zend OPcache - it was already loaded
Nextcloud version 21.0.4.1. NextCloudPi version v1.40.4
e
Cannot load Zend OPcache - it was already loaded
stopping Cron...
stopping Redis...
stopping Postfix...
stopping HPB...
stopping logs...
Cannot load Zend OPcache - it was already loaded
Stopping apache
Stopping PHP-fpm
Stopping mariaDB
LAMP cleanup complete
Cannot load Zend OPcache - it was already loaded
Cannot load Zend OPcache - it was already loaded
Cannot load Zend OPcache - it was already loaded
Starting PHP-fpm
Cannot load Zend OPcache - it was already loaded
Starting Apache
Starting mariaDB
2021-11-14 13:33:57 0 [Note] mysqld (mysqld 10.3.31-MariaDB-0+deb10u1) starting as process 110 ...
Cannot load Zend OPcache - it was already loaded
Starting Redis
Starting Cron
Starting Postfix
Provisioning
Cannot load Zend OPcache - it was already loaded
Provisioning Redis password
Updating NextCloud config with Redis password
Provisioning MariaDB password
Updating NextCloud config with MariaDB password
Cannot load Zend OPcache - it was already loaded
Running nc-limits
Cannot load Zend OPcache - it was already loaded
Using 3018900480B for PHP
Using 6 PHP threads
Using 955968512 memory for the database
Stopping redis-server: redis-server.
Starting redis-server: redis-server.
Starting notify_push daemon
Configuring Domain
Cannot load Zend OPcache - it was already loaded
Cannot load Zend OPcache - it was already loaded
System config value trusted_domains => 11 set to string 86.174.182.217
Cannot load Zend OPcache - it was already loaded
System config value trusted_domains => 1 set to string 172.17.0.3
Cannot load Zend OPcache - it was already loaded
Cannot load Zend OPcache - it was already loaded
Cannot load Zend OPcache - it was already loaded
Cannot load Zend OPcache - it was already loaded
Cannot load Zend OPcache - it was already loaded
Nextcloud version 21.0.4.1. NextCloudPi version v1.40.4
e
The output of your config.php file in /data/nextcloud/config/config.php
https://prnt.sc/1zkkley -part 1 of screenshot (scribbled out bit is my public ip)
https://prnt.sc/1zkknfz -part 2 of screenshot