Reasons of "Client Authentication Failed" error at the Payment Gateway's end

[Pabbly Team]

[Customer Query] -

Getting a "Client Authentication failed" error for PayPal then if I click over to pay with stripe that error remains even though I think it is only for PayPal and would be confusing for clients. Regardless trying to see what the issue is with PayPal.

 

[Sonam]

The error "Client Authentication Failed" is triggered only when the payment gateway credentials are entered at the wrong place i.e. in place of live gateway keys by mistake if test gateway credentials are added then it will show the same error. For instance, if we are misplacing the keys like entering test credentials with the live mode option then it will throw the error. For reference, please follow this video -https://www.screenpresso.com/cloud/FKplg/

Hence, please check the settings accordingly.