I am trying to create anonymous editable board for my customers but getting this error as soon as I click on to create a board without registration. Kindly please help in this, I am ready to provide whatever information is required from my end to resolve this issue at the earliest.
Node.js Server:
const jwt = require('njwt');
app.post('/jwt', (req,res) => {
   var claims = {
      iss: 'XXX'
   }
   var Ejwt = jwt.create(claims,'XXX');
  res.send(Ejwt);
})
Client Side Code:
 async function getTokenFromServer() {
  await fetch('/jwt', {
       method: 'POST'
      })
  .then(res => res.json())
   .then((data) => {
    return data;
  })
 }
