Nextcloud version: 18.0.4
Operating system and version: 12.2-4
PHP version: 7.4.3
After the installation I get the hint to install the PHP module imagick.
As an absolute beginner with no real experience under Umbutu, I failed of course.
In the logging I get follow error several times per second.
Trying to access array offset on value of type null at /var/www/nextcloud/3rdparty/leafo/scssphp/src/Compiler.php#5230
Unfortunately I was not able to connect to the server via FTP to view the config.php.