Unable to create slash commands

This is my code:

client.application.commands.create({
  name: 'test',
  description: 'devs',
})
  .then(console.log)
  .catch(console.error);

client.application.commands.create({
  name: 'test',
  description: 'devs',
})
  .then(console.log)
  .catch(console.error);

client.application.commands.create({
  name: 'test',
  description: 'devs',
})
  .then(console.log)
  .catch(console.error);

client.application.commands.create({
  name: 'test',
  description: 'devs',
})
  .then(console.log)
  .catch(console.error);

This is the error Im getting

Uncaught TypeError TypeError: Cannot read properties of null (reading 'commands')

Uncaught TypeError TypeError: Cannot read properties of null (reading 'commands')

Uncaught TypeError TypeError: Cannot read properties of null (reading 'commands')

Uncaught TypeError TypeError: Cannot read properties of null (reading 'commands')