API not working after changing to live

Tested with sandbox runs fine, but after generated live credential and apply into the plugin, error “Your API credentials are either missing or invalid: Got Http response code 401 when accessing https://api.paypal.com/v1/oauth2/token.” appeared.

Below is the log.

[09-08-2018 03:02:47] Inpsyde\Lib\PayPal\Core\PayPalHttpConnection : INFO: POST https://api.paypal.com/v1/oauth2/token
[09-08-2018 03:02:48] Inpsyde\Lib\PayPal\Core\PayPalHttpConnection : INFO: Response Status : 401
[09-08-2018 03:02:48] Inpsyde\Lib\PayPal\Core\PayPalHttpConnection : ERROR: Got Http response code 401 when accessing https://api.paypal.com/v1/oauth2/token. {“error”:”invalid_client”,”error_description”:”Client Authentication failed”}