Title: invalid_client – Client Authentication failed
Last modified: May 14, 2022

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# invalid_client – Client Authentication failed

 *  Resolved [mgdperera](https://wordpress.org/support/users/mgdperera/)
 * (@mgdperera)
 * [4 years ago](https://wordpress.org/support/topic/invalid_client-client-authentication-failed/)
 * Im getting error message as follows –
    invalid_client – Client Authentication
   failed An error occurred, We were unable to process your order, please try again.

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [WebToffee](https://wordpress.org/support/users/webtoffee/)
 * (@webtoffee)
 * [4 years ago](https://wordpress.org/support/topic/invalid_client-client-authentication-failed/#post-15648311)
 * Hi [@mgdperera](https://wordpress.org/support/users/mgdperera/),
 * Thank you for reaching out to us
 * Please make sure that you have provided the correct Paypal credentials in the
   plugin settings. If the issue persists can you please check with Paypal if there
   are any issues with your account?
 *  [lilly1995](https://wordpress.org/support/users/lilly1995/)
 * (@lilly1995)
 * [3 years, 9 months ago](https://wordpress.org/support/topic/invalid_client-client-authentication-failed/#post-15989572)
 * Hey mgdperera (@mgdperera) — did you ever get a fix for this?… A few days ago,
   I installed WebToffee PayPal Express Checkout Payment Gateway….. and I myself
   am having the same exact issue. And it’s not my Paypal, because my Paypal standard
   works fine.
    Please kindly let me know,
 * Thanks,
    Lilly

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘invalid_client – Client Authentication failed’ is closed to new replies.

 * ![](https://ps.w.org/express-checkout-paypal-payment-gateway-for-woocommerce/
   assets/icon-256x256.gif?rev=3385064)
 * [Payment Gateway of PayPal for WooCommerce](https://wordpress.org/plugins/express-checkout-paypal-payment-gateway-for-woocommerce/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/express-checkout-paypal-payment-gateway-for-woocommerce/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/express-checkout-paypal-payment-gateway-for-woocommerce/)
 * [Active Topics](https://wordpress.org/support/plugin/express-checkout-paypal-payment-gateway-for-woocommerce/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/express-checkout-paypal-payment-gateway-for-woocommerce/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/express-checkout-paypal-payment-gateway-for-woocommerce/reviews/)

 * 2 replies
 * 3 participants
 * Last reply from: [lilly1995](https://wordpress.org/support/users/lilly1995/)
 * Last activity: [3 years, 9 months ago](https://wordpress.org/support/topic/invalid_client-client-authentication-failed/#post-15989572)
 * Status: resolved