Unable to load DLL 'libargon2.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

Geting below error while calling service

Message authentication failed. Service: https://dashboard-dev.onsolve.com/DashboardSTS/Service.svc/IWSTrust13/ Action: http://docs.oasis-open.org/ws-sx/ws-trust/200512/RST/Issue ClientIdentity: ActivityId: SecurityTokenException: Unknown internal error. ---> DllNotFoundException: Unable to load DLL 'libargon2.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

If I manually add it in bin folder,tried both x86/64 .I am getting below error Message authentication failed. Service: https://dashboard-dev.onsolve.com/DashboardSTS/Service.svc/IWSTrust13/ Action: http://docs.oasis-open.org/ws-sx/ws-trust/200512/RST/Issue ClientIdentity: ActivityId: SecurityTokenException: Unknown internal error. ---> BadImageFormatException: An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)

Have you provided the client credential that the Message security mode requires? How do you invoke the service? generally speaking, the invocation by using a client proxy does not include the library like libargon2.dll. why do you have to refer to this library on the client-side? The error seemingly indicates that the DLL is key to the issue. Is this class library an encapsulation of WCF service calls?
Look forward to your reply.