TypeError: Cannot read properties of undefined (reading 'ServerClient')

[niklasgrewe]

Hi, after i used your stack and added some new pages, i wanted to restart my dev server with npm run dev but i get the following error in the console:

/path/to/project/app/routes/blog.rss[.]xml.ts:23
            const frontMatter = JSON.parse(post.frontmatter)
                                                ^
TypeError: Cannot read properties of undefined (reading 'ServerClient')
    at Object.<anonymous> (/path/to/project/app/routes/blog.rss[.]xml.ts:23:49)

Do you have any idea what this error means and how to fix it? I have not changed anything related to the stack.