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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): 22.2.3snap2
Operating system and version (eg, Ubuntu 20.04): Arch Linux
Apache or nginx version (eg, Apache 2.4.25): 2.4.52
PHP version (eg, 7.4): 8.0.13
The issue you are facing:
PHP spam error
PHP Fatal error: Cannot use OCP\Constants as Constants because the name is already in use in /var/snap/nextcloud/28713/nextcloud/extra-apps/groupfolders/lib/Command/ACL.php on line 35
and PHP restart over and over again taking resources. Maybe extra-app since it is migrated
Is this the first time you’ve seen this error? (Y/N):
Y
Steps to replicate it:
Not sure, apears at beginning.
The output of your Nextcloud log in Admin > Logging:
Cannot use OCP\Constants as Constants because the name is already in use at /var/snap/nextcloud/28713/nextcloud/extra-apps/groupfolders/lib/Command/ACL.php#35
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'apps_paths' =>
array (
0 =>
array (
'path' => '/snap/nextcloud/current/htdocs/apps',
'url' => '/apps',
'writable' => false,
),
1 =>
array (
'path' => '/var/snap/nextcloud/current/nextcloud/extra-apps',
'url' => '/extra-apps',
'writable' => true,
),
),
'supportedDatabases' =>
array (
0 => 'mysql',
),
'memcache.locking' => '\\OC\\Memcache\\Redis',
'memcache.local' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => '/tmp/sockets/redis.sock',
'port' => 0,
),
'passwordsalt' => '',
'secret' => '',
'trusted_domains' =>
array (
0 => 'localhost',
1 => 'nextcloud.xxx.xxx',
),
'datadirectory' => '/var/snap/nextcloud/common/nextcloud/data',
'dbtype' => 'mysql',
'version' => '22.2.3.0',
'overwrite.cli.url' => 'http://localhost',
'dbname' => 'nextcloud',
'dbhost' => 'localhost:/tmp/sockets/mysql.sock',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'nextcloud',
'dbpassword' => '',
'installed' => true,
'instanceid' => 'xx',
'overwritehost' => 'nextcloud.xxx.xxx',
'theme' => '',
'loglevel' => 0,
'maintenance' => false,
'csrf.optout' =>
array (
0 => '/KeeWeb\\/\\d+\\.\\d+\\.\\d+/',
1 => '/^WebDAVFS/',
2 => '/^Microsoft-WebDAV-MiniRedir/',
3 => '/^okhttp\\/\\d+\\.\\d+\\.\\d+/',
),
'mail_from_address' => 'system',
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_domain' => 'xxx',
'mail_smtpauth' => 1,
'mail_smtphost' => 'xxx',
'mail_smtpport' => '465',
'mail_smtpname' => 'xxx',
'mail_smtppassword' => 'xxx',
'mail_smtpsecure' => 'ssl',
'app_install_overwrite' =>
array (
0 => 'sharerenamer',
),
'overwriteprotocol' => 'https',
'mail_smtpauthtype' => 'LOGIN',
);