error running sync project. Remote certificate is invalid.

I am using version 8.1.4. I am getting below error . The job was running fine before but suddenly this error stated coming and job gets frozen. 

Please help by giving some solution step.

ErrorMessages (2023-06-20 14:19:31.130) [810222] Error executing script 'CCC_HelpdeskCA_createObject'.
[System.Net.WebException] The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.
[System.Security.Authentication.AuthenticationException] The remote certificate is invalid according to the validation procedure.
at StdioProcessor.StdioProcessor._Execute(Job job)
at VI.JobService.JobComponents.ScriptComponent.Activate(String task)
at VI.JobService.JobComponents.ScriptComponent._TaskScriptExec()
at VI.DB.Scripting.ScriptRunner.Eval(String key, Object[] parameters)
---- Start of Inner Exception ----
at DynScripts.Scripts_xBKrvmFVwyqoxSxDP3QaSZuBPuM.CCC_HelpdeskCA_createObject(String p_first_name, String p_last_name, String p_Alias, String p_userid, String p_admin_org, String p_type, String p_domain, String p_organization, String p_access_type, String p_email_address)
at DynScripts.Scripts_xBKrvmFVwyqoxSxDP3QaSZuBPuM.CCC_HelpdeskCA_login()
at HelpdeskCA.USD_WebService.login(String username, String password)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request)
at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request)
---- Start of Inner Exception ----
at System.Net.ConnectStream.WriteHeaders(Boolean async)
at System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size)
at System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size)
at System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)
at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest, Boolean renegotiation)
at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.StartSendAuthResetSignal(ProtocolToken message, AsyncProtocolRequest asyncRequest, Exception exception)