workers dont see my R2

export default {
  async fetch(request, env, ctx) {
    try {
      // Check if the R2 bucket binding exists
      if (!env.MY_BUCKET) {
        throw new Error("R2 bucket binding 'MY_BUCKET' is not defined");
      }

      const prefix = 'your-prefix/' // Replace with your desired prefix
      const options = {
        prefix: prefix,
        limit: 1000, // Adjust as needed
      }

      const objects = await env.MY_BUCKET.list(options);
      const totalFiles = objects.objects.length;

      const first10Files = objects.objects.slice(0, 10).map(object => ({
        name: object.key,
        lastModified: new Date(object.uploaded).toISOString(),
      }));

      const latestAdditionTime = first10Files.length > 0
        ? first10Files.reduce((latest, file) => 
            file.lastModified > latest ? file.lastModified : latest, 
            first10Files[0].lastModified)
        : null;

      return new Response(JSON.stringify({
        totalFiles,
        latestAdditionTime,
        first10Files,
      }, null, 2), {
        headers: { 'Content-Type': 'application/json' },
      });
    } catch (error) {
      console.error("Error in worker:", error);
      return new Response(JSON.stringify({ error: error.message }), {
        status: 500,
        headers: { 'Content-Type': 'application/json' },
      });
    }
  }
}

name = "r2-test"
main = "worker.js"
compatibility_date = "2023-08-23"

[[r2_buckets]]
binding = 'MY_BUCKET' # <~ valid JavaScript variable name
bucket_name = 'jast'