The quill js works when hosted in a single HTML Page, but when if used with node js like this :

app.post("/send_email", attachmentUpload, (req, res) => {
    if (!req.file) {
      
        return res.send("Error uploading file");
      } else {
        const recipient = req.body.email;
        const subject = req.body.subject;
        const message = req.body.message;
        const attachmentPath = req.file;
      
      
      console.log("recipient:", recipient);
        console.log("subject:", subject);
        console.log("message:", message);
        console.log("attachmentPath:", attachmentPath);
        
       
        return res.redirect("/success.html");

      }

I get fairly rendered quill js. Pic attached.

If have encountered a similar problem before kindly help. As you may have guessed, I am a newbie.