OAuthError: Client authentication failed. Either the client or the client credentials are invalid

I am setting SSO via okta using cdn library but when i am trying with my test account integrator-2174820.okta.com, i am getting claims and able to login. but when i am trying to do the same with my client below error occuring. At client side in logs it is showing login success.

OAuthError: Client authentication failed. Either the client or the client credentials are invalid. at d (https://unpkg.com/@okta/okta-auth-js@7.4.1/dist/okta-auth-js.min.js:2:57620) at

Hi,

Maybe this can help - https://support.okta.com/help/s/article/error-invalid-client-client-authentication-failed-when-calling-the-token-endpoint