Unexpected API Response Error 16464 — Need Clarification

karish harry 25

System.InvalidOperationException: Operation failed with error code <error_code_188827>

at MyApp.Controllers.PaymentController.ProcessRequest(18882749655) in /src/Controllers/PaymentController.cs:line 496

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

18882749655

Erland Sommarskog 137.5K Reputation points MVP Volunteer Moderator

2025-09-11T21:27:02.19+00:00

Looks like a duplicate of https://learn.microsoft.com/en-us/answers/questions/5522677/unexpected-api-response-error-16464-need-clarifica.

In any case, if you want an answer, you need provide clarification in which situation this is happening to you.
Anjan Kumar Chippa (Quadrant Resource LLC) 0 Reputation points Microsoft External Staff Moderator

2025-10-23T07:47:37.4066667+00:00

Hi @karish harry ,

As we haven’t heard back from you, we wanted to kindly follow up to check if the issue is resolved? If not, please provide additional details like from where you are getting this error so that we can investigate further and provide you the best solution possible.

Thank you @Erland Sommarskog for the prompt response.

Thanks,
Anjan Kumar Chippa

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