can some help? im having this erro too, but the paypal status says that sandbox is operational. Error: Error: Request to post https://www.sandbox.paypal.com/v1/oauth2/token failed with 400 error. Correlation id: 5fdea2a4b284a, 5fdea2a4b284a { "error": "invalid_client", "error_description": "Client credentials are missing" } at XMLHttpRequest.<anonymous> (https://www.paypalobjects.com/api/checkout.js:14229:39) at Object._RECEIVE_MESSAGE_TYPE.(anonymous function) [as postrobot_message_response] (https://www.paypalobjects.com/api/checkout.js:3192:31) at receiveMessage (https://www.paypalobjects.com/api/checkout.js:2742:60) at messageListener (https://www.paypalobjects.com/api/checkout.js:2763:13) at Object._RECEIVE_MESSAGE_TYPE.(anonymous function) [as postrobot_message_response] (https://www.paypalobjects.com/api/checkout.js:3192:31) at receiveMessage (https://www.paypalobjects.com/api/checkout.js:2742:60) at messageListener (https://www.paypalobjects.com/api/checkout.js:2763:13) at XMLHttpRequest.<anonymous> (https://www.paypalobjects.com/api/checkout.js:14229:39) at Object._RECEIVE_MESSAGE_TYPE.(anonymous function) [as postrobot_message_response] (https://www.paypalobjects.com/api/checkout.js:3192:31) at receiveMessage (https://www.paypalobjects.com/api/checkout.js:2742:60) at messageListener (https://www.paypalobjects.com/api/checkout.js:2763:13) at Object._RECEIVE_MESSAGE_TYPE.(anonymous function) [as postrobot_message_response] (https://www.paypalobjects.com/api/checkout.js:3192:31) at receiveMessage (https://www.paypalobjects.com/api/checkout.js:2742:60) at messageListener (https://www.paypalobjects.com/api/checkout.js:2763:13) at deserializeError (https://www.paypalobjects.com/api/checkout.js:3458:23) at https://www.paypalobjects.com/api/checkout.js:3479:270 at https://www.paypalobjects.com/api/checkout.js:3324:30 at eachArray (https://www.paypalobjects.com/api/checkout.js:3307:51) at each (https://www.paypalobjects.com/api/checkout.js:3313:35) at replaceObject (https://www.paypalobjects.com/api/checkout.js:3323:13) at https://www.paypalobjects.com/api/checkout.js:3325:169 at eachObject (https://www.paypalobjects.com/api/checkout.js:3310:65) at each (https://www.paypalobjects.com/api/checkout.js:3313:144) at replaceObject (https://www.paypalobjects.com/api/checkout.js:3323:13)
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