I'm new to linux, therefore I seeked help. Error message tells me to check my configuration settings for compatibility with drush - I don't know what needs to be done to make them compatible (empty some values, what values?). And there is no example.drush.ini file in my vendor/drush/drush/examples folder.

@kiamlaluno How do I check where settings.php is searching for the 'sync' directory?

It turns out that I made a mistake - to anyone who may experience similar strange exceptions: check if in your VS Code when in debug mode under BREAKPOINTS label you don't have the box next to 'Everything' checked - if yes then uncheck it and you should be fine :-)

Thanks @leymannx, ksm($variables) works fine. Can I upvote your answer somehow?