Problem

Configuration is correct on B2Bi side, but only the generation of report is not working to the Amplify platform due to the error seen in <hostname>_cn_metering.log file :
2024-01-28 02:00:05,971 - ERROR [Timer-2] (RestUtil) - Could not sign the jwsObject
2024-01-28 02:00:05,971 - ERROR [Timer-2] (Reporter) - Failed to automatically send report. Could not generate client assertion

Resolution

The error is due to a mismatch of <file>.json and <file>.pem located under :
/shared/local_te/conf/metering/json/<file>.json
/shared/local_te/conf/metering/keys/<file>.pem

The .pem files should be regenerated and a new ConfigureB2Bi has to be done.