Authentication failed due to invalid authentication credentials or a missing Authorization header

[cromeyellow]

Trying to integrate PayPal Integrated Checkout with OpenCart 3.0.3.8 and I keep getting the error

Authentication failed due to invalid authentication credentials or a missing Authorization header.

even though login is fine and I get approval.

[MTS_Chiranjeevi]

Good day @cromeyellow,

Thank you for posting to the PayPal community.

Third party platforms eCommerce develops their own plugins/modules.

Could you please contact the support of eCommerce OpenCart to cross check internal integration setup and make sure you have granted required API scope permissions to OpenCart to perform all type of API operations on your behalf.

Merchants usually receives this error "AUTHENTICATION_FAILURE", when the third party eCommerce partner on-boards the merchant with limited permissions.

Please refer the below guide links.

https://developer.paypal.com/docs/api/payments/v2/#error-AUTHENTICATION_FAILURE

https://developer.paypal.com/docs/api/partner-referrals/v1/#partner-referrals_create!path=products&t...

https://developer.paypal.com/docs/api/partner-referrals/v2/#partner-referrals_create!path=products&t...

https://developer.paypal.com/docs/api/partner-referrals/v2/ 

If your still facing any issues, please create a MTS ticket via - https://www.paypal-support.com/s/?language=en_US  with the detail information and error details.

Sincerely,

Chiranjeevi

PayPal/Braintree MTS

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[HFDGGGD]

I have my email address and password but I don't have authenticator app its lose

[HFDGGGD]

I have my email address and password but I don't have authenticator app its lose please help me what i do