I am facing below issue, What can be the possible issue.
500 Internal Server Error at ssCrewMember_IS.CcOneSignal.ActionREST_SendPushNotificationToUserId(HeContext heContext, ICcOneSignalCallbacks _callbacks, STSTR_SendPushNotificationToUserIdInputStructure inParamInput, STSTR_SendPushNotificationToUserIdOutputStructure& outParamResponse)
Hi Manjeet,Check the OneSignal App ID and REST API Key are correctly configured.
Refer to the documentation for cross-checking the same: Onesignal doc
Hope it helps,
Assif