@luke Yea sorry about that.
I figured it out already.
I just had to use this
pdfjs.GlobalWorkerOptions.workerSrc = //unpkg.com/pdfjs-dist@${pdfjs.version}/build/pdf.worker.min.js;
instead of this
pdfjs.GlobalWorkerOptions.workerSrc = new URL( "pdfjs-dist/build/pdf.worker.min.js, import.meta.url ).toString();