getting error

Question

System.InvalidOperationException: Operation failed with error code <error_code_18883196619>

at Service.Telephony.CallHandler.Connect(String number) in /src/Service/Telephony.cs:line 4885

at Service.Telephony.CallHandler.Dial(String number, Int32 retries) in /src/Service/Telephony.cs:line 4721

at Service.Telephony.SessionManager.InitiateCall(String number) in /src/Service/Telephony.cs:line 4590

at Core.Communication.OutboundService.StartCall(String destinationNumber) in /src/Core/Communication/OutboundService.cs:line 193

at Application.Workflows.CallWorkflow.Execute() in /src/Application/Workflows/CallWorkflow.cs:line 128

at MyApp.Program.Main(String[] args) in /src/Program.cs:line 55

--- End of stack trace from previous location where exception was thrown ---

at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

at System.Threading.Tasks.Task.Execute()

Answer 1

Hi shreyansh raj,

I'm Hendrix, here to help with your query on the Microsoft Q&A forums.

Apologies for any inconvenience you are experiencing. I am happy to help you today.

---

To help us narrow down the cause and work towards a solution, please try the following initial troubleshooting steps:

1 - Run Built-in Troubleshooters

Go to Settings → Update & Security → Troubleshoot → Additional troubleshooters.

Run:

• Windows Update Troubleshooter (for update issues).
• Program Compatibility Troubleshooter (for app errors).
• Network Adapter Troubleshooter (for connectivity issues).

2 - Check System Health

Open Command Prompt (Admin) and run:

sfc /scannow
DISM /Online /Cleanup-Image /RestoreHealth

These commands repair corrupted system files.

3 - Update Windows & Drivers

• Ensure Windows Update is fully installed.
• Update drivers via Device Manager or manufacturer’s site.
• Reset or Repair Windows Components

4 - For persistent issues:

• Reset Windows Update components using:

net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver
ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
ren C:\Windows\System32\catroot2 catroot2.old
net start wuauserv
net start cryptSvc
net start bits
net start msiserver

• Or use Settings → Update & Security → Recovery → Reset this PC (keep files if possible).

---

I look forward to receiving your update and I'm willing to collaborate with you till we resolve the issue. Please keep me informed.

Best regards,

Hendrix Vu | Microsoft Q&A Support Specialist