AuthSdkError: The "codeVerifier" (generated and saved by your app) must be passed to /token

Questions API
1

I use GitHub - okta/okta-auth-js: The official js wrapper around Okta's auth API
I get this error while trying to set tokens using below code

AuthSdkError: The “codeVerifier” (generated and saved by your app) must be passed to /token

My Config

{
  issuer: `****.okta.com/oauth2/default`,
  clientId: '******',
  redirectUri: 'http://localhost:3000/authentication/callback',
  scopes: ['openid', 'profile', 'email'],
  postLogoutRedirectUri: 'http://localhost:3000/login',
  tokenManager: {
    autoRenew: false,
  },
}

My authenticate method

try {
      const transaction = await authClient.signInWithCredentials({
        username: 'ajingopi@email.com',
        password: '*********',
      })

      if (transaction?.status === 'SUCCESS') {
        authClient.token
          .getWithoutPrompt({
            responseType: 'code',
            pkce: false,
            sessionToken: transaction.sessionToken,
            scopes: ['openid', 'email', 'profile'],
          })
          .then(function (res) {
            console.log(res)
            const tokens = res.tokens

            // Do something with tokens, such as
            authClient.tokenManager.setTokens(tokens)
          })
          .catch(function (err) {
            console.log(err)
          })
      }
    } catch (error: any) {
      console.log(error)
    }

It sets a valid okta session but it throws the above error I mentioned initially. I got confirmation from below code.

authClient.session.exists().then(async function (exists) {
    if (exists) {
      console.log('logged in')
    } else {
      console.log('not logged in')
    }
  })

Also once I use authClient.signOut() once the session is set, it sign out the user from okta session. But not from my udemy sso session.

I would like to know something I am doing wrong. Thanks in advance.