graphql-yoga server installation fails

[mertcihankurel]

Hi guys. I'm trying to use graphql-yoga to start my server in my new next.js application. Following this guide on docs:https://the-guild.dev/graphql/yoga-server/docs doesn't work for some reason as attached in image.

I removed and re-installed next.js app a few times, I cleared caches and updated node.js to the latest version. When I start server with some simple code, it works. But I couldn't make it work with this starter code suggested in docs. I need help.

Thanks