Apps directory not found! after bigint convert

Hello,

I tried to install the latest version from Nextcloud.
Everything went fine, until I convert to bigint.
After that I always get this error:

apps directory not found! Please put the Nextcloud apps folder in the Nextcloud folder or the folder above. You can also configure the location in the config.php file.

In my config I have done this:

  "apps_paths" => [
    [
            "path"     => OC::$SERVERROOT . "/apps",
            "url"      => "/apps",
            "writable" => true,
    ],
  ],

I checked the folder rights:


 660157  4 drwxr-x--- 43 www-data www-data  4096 Apr 22 21:25 apps

Here is the rest of my config.php (I removed DB, SMTP, and PW Data):

$CONFIG = array (
  'trusted_domains' =>
  array (
    0 => 'cloud.malte-kiefer.de',
  ),
  'datadirectory' => '/var/nc_data',
  'dbtype' => 'mysql',
  'version' => '18.0.4.2',
  'overwrite.cli.url' => 'https://cloud.malte-kiefer.de',
  'installed' => true,
  'instanceid' => 'oc87erc8qk27',
  'activity_expire_days' => 14,
  'auth.bruteforce.protection.enabled' => true,
  "apps_paths" => [
    [
            "path"     => OC::$SERVERROOT . "/apps",
            "url"      => "/apps",
            "writable" => true,
    ],
  ],
  'blacklisted_files' =>
  array (
    0 => '.htaccess',
    1 => 'Thumbs.db',
    2 => 'thumbs.db',
  ),
  'cron_log' => true,
  'enable_previews' => true,
  'enabledPreviewProviders' =>
  array (
    0 => 'OC\\Preview\\PNG',
    1 => 'OC\\Preview\\JPEG',
    2 => 'OC\\Preview\\GIF',
    3 => 'OC\\Preview\\BMP',
    4 => 'OC\\Preview\\XBitmap',
    5 => 'OC\\Preview\\Movie',
    6 => 'OC\\Preview\\PDF',
    7 => 'OC\\Preview\\MP3',
    8 => 'OC\\Preview\\TXT',
    9 => 'OC\\Preview\\MarkDown',
  ),
  'filesystem_check_changes' => 0,
  'filelocking.enabled' => 'true',
  'htaccess.RewriteBase' => '/',
  'integrity.check.disabled' => false,
  'knowledgebaseenabled' => false,
  'logfile' => '/var/nc_data/nextcloud.log',
  'loglevel' => 2,
  'logtimezone' => 'Europe/Berlin',
  'log_rotate_size' => 104857600,
  'maintenance' => false,
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'memcache.locking' => '\\OC\\Memcache\\Redis',
  'overwriteprotocol' => 'https',
  'preview_max_x' => 1024,
  'preview_max_y' => 768,
  'preview_max_scale_factor' => 1,
  'redis' =>
  array (
    'host' => '/var/run/redis/redis-server.sock',
    'port' => 0,
    'timeout' => 0.0,
  ),
  'quota_include_external_storage' => false,
  'share_folder' => '/Shares',
  'skeletondirectory' => '',
  'theme' => '',
  'trashbin_retention_obligation' => 'auto, 7',
  'updater.release.channel' => 'stable',
);

I use the nginx to show me the page, with this configuration:

upstream php-handler {
	server unix:/var/run/php/php7.4-fpm.sock;
}

server {
	listen 80;
	listen [::]:80;
	server_name cloud.malte-kiefer.de;
	# enforce https
	return 301 https://$server_name:443$request_uri;
}

server {
	listen 443 ssl http2;
	listen [::]:443 ssl http2;
	server_name cloud.malte-kiefer.de;

	ssl_certificate /etc/nginx/ssl/cloud.malte-kiefer.de.crt;
	ssl_certificate_key /etc/nginx/ssl/cloud.malte-kiefer.de.key;


	# logging
	error_log /var/log/nginx/cloud.malte-kiefer.de.error.log error;

	add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;" always;
	#
	add_header Referrer-Policy "no-referrer" always;
	add_header X-Content-Type-Options "nosniff" always;
	add_header X-Download-Options "noopen" always;
	add_header X-Frame-Options "SAMEORIGIN" always;
	add_header X-Permitted-Cross-Domain-Policies "none" always;
	add_header X-Robots-Tag "none" always;
	add_header X-XSS-Protection "1; mode=block" always;

	fastcgi_hide_header X-Powered-By;
	set $base /var/www;
	root $base/cloud.malte-kiefer.de;

	location = /robots.txt {
		allow all;
		log_not_found off;
		access_log off;
	}

	location = /.well-known/carddav {
		return 301 $scheme://$host:$server_port/remote.php/dav;
	}
	location = /.well-known/caldav {
		return 301 $scheme://$host:$server_port/remote.php/dav;
	}

	client_max_body_size 512M;
	fastcgi_buffers 64 4K;

	gzip on;
	gzip_vary on;
	gzip_comp_level 4;
	gzip_min_length 256;
	gzip_proxied expired no-cache no-store private no_last_modified no_etag auth;
	gzip_types application/atom+xml application/javascript application/json application/ld+json application/manifest+json application/rss+xml application/vnd.geo+json application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt text/x-component text/x-cross-domain-policy;

	location / {
		rewrite ^ /index.php;
	}

	location ~ ^\/(?:build|tests|config|lib|3rdparty|templates|data)\/ {
		deny all;
	}
	location ~ ^\/(?:\.|autotest|occ|issue|indie|db_|console) {
		deny all;
	}

	location ^~ /apps/rainloop/app/data {
		deny all;
	}

	location ~* \.(?:flv|mp4|mov|m4a|mp3|mkv)$ {
		fastcgi_split_path_info ^(.+?.php)(\/.*|)$;
		set $path_info $fastcgi_path_info;
		try_files $fastcgi_script_name =404;
		include fastcgi_params;
		include php_optimization.conf;
	}

	location ~ ^\/(?:index|remote|public|cron|core\/ajax\/update|status|ocs\/v[12]|updater\/.+|oc[ms]-provider\/.+)\.php(?:$|\/) {
		fastcgi_split_path_info ^(.+?.php)(\/.*|)$;
		set $path_info $fastcgi_path_info;
		try_files $fastcgi_script_name =404;
		include fastcgi_params;
		include php_optimization.conf;
	}

	location ~ ^\/(?:updater|oc[ms]-provider)(?:$|\/) {
		try_files $uri/ =404;
		index index.php;
	}

	location ~ \.(?:css|js|woff2?|svg|gif|map)$ {
		try_files $uri /index.php$request_uri;
		add_header Cache-Control "public, max-age=15778463";
		add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload;" always;
		add_header Referrer-Policy "no-referrer" always;
		add_header X-Content-Type-Options "nosniff" always;
		add_header X-Download-Options "noopen" always;
		add_header X-Frame-Options "SAMEORIGIN" always;
		add_header X-Permitted-Cross-Domain-Policies "none" always;
		add_header X-Robots-Tag "none" always;
		add_header X-XSS-Protection "1; mode=block" always;

		access_log off;
	}

	location ~ \.(?:png|html|ttf|ico|jpg|jpeg|bcmap|mp4|webm)$ {
		try_files $uri /index.php$request_uri;
		access_log off;
	}
}

Can you guys help me?