I've done the same line numerous times, and they all work in production, but for some reason, they don't work here?

export async function getCourseLessonsMetaData(course: string) {
const testPath = path.join(process.cwd(), "courses", course, "lessons");
const folders = await fs.readdir(testPath); // <---- This is 1000% the cause of the error. It works in dev, but not in production.

let courseLessonsMeta: CourseLessonMetaData[] = [];

for (const folder of folders) {
try {
const module = await import(
`/courses/${course}/lessons/${folder}/index.mdx`
);
const metadata = module.metadata;
metadata.slug = folder;

courseLessonsMeta.push(metadata);
} catch (error) {
// Handle the error here
console.error(`Error processing folder ${folder}:`, error);
}
}

courseLessonsMeta.sort((a, b) => (a.unitNumber < b.unitNumber ? -1 : 1));

return courseLessonsMeta;
}

Are you importing this into a client component?

Nope

it's a server component

Does this file have the “use server” directive at the top?

No but I'll try it

Here's the thing, it works in dev but not in production

so I'm very doubtful use server will change anything