Stripe not working

Facing Unable to process payment, please try again.

Here is the log:

2020-08-24T10:39:27+00:00 DEBUG 
====Stripe Version: 4.3.2====
====Start Log====
customers/cus_H6ijEQ57zdnCCd/sources request: Array
(
    [limit] => 100
)

====End Log====

2020-08-24T10:39:34+00:00 DEBUG 
====Stripe Version: 4.3.2====
====Start Log====
customers/cus_H6ijEQ57zdnCCd/sources request: Array
(
    [limit] => 100
)

====End Log====

2020-08-24T10:40:03+00:00 DEBUG 
====Stripe Version: 4.3.2====
====Start Log====
customers/cus_H6ijEQ57zdnCCd request: Array
(
    [email] => *********
    [description] => Name: test test, Username: test
    [metadata] => Array
        (
        )

)

====End Log====

2020-08-24T10:40:03+00:00 DEBUG 
====Stripe Version: 4.3.2====
====Start Log====
Error: stdClass Object
(
    [error] => stdClass Object
        (
            [code] => resource_missing
            [doc_url] => https://stripe.com/docs/error-codes/resource-missing
            [message] => No such customer: 'cus_H6ijEQ57zdnCCd'; a similar object exists in test mode, but a live mode key was used to make this request.
            [param] => id
            [type] => invalid_request_error
        )

)

====End Log====

Quick help would be appreciated.