EXE Closing After a while

Hi im not a coder actually. One of my friend made a code for me and he is busy right now. The exe file closing after a while, and when i open it with powershell i receive that error

Unhandled exception. System.Net.Http.HttpRequestException: Error while copying content to a stream. ---> System.IO.IOException: The decryption operation failed, see inner exception. ---> System.ComponentModel.Win32Exception (0x80090330): Belirtilen verilerin şifresi çözülemedi. --- End of inner exception stack trace --- at System.Net.Security.SslStream.ReadAsyncInternal[TReadAdapter](TReadAdapter adapter, Memory1 buffer) at System.Net.Http.HttpConnection.FillAsync() at System.Net.Http.HttpConnection.ChunkedEncodingReadStream.CopyToAsyncCore(Stream destination, CancellationToken cancellationToken) at System.Net.Http.HttpConnectionResponseContent.SerializeToStreamAsync(Stream stream, TransportContext context, CancellationToken cancellationToken) at System.Net.Http.HttpContent.LoadIntoBufferAsyncCore(Task serializeToStreamTask, MemoryStream tempBuffer) --- End of inner exception stack trace --- at System.Net.Http.HttpContent.LoadIntoBufferAsyncCore(Task serializeToStreamTask, MemoryStream tempBuffer) at System.Net.Http.HttpClient.FinishSendAsyncBuffered(Task1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts) at RTX3070.Program.CheckStockFromListAsync(String Url) in C:\Users\Tanju\source\repos\RTX3070\RTX3070\Program.cs:line 42 at RTX3070.Program.Main(String[] args) in C:\Users\Tanju\source\repos\RTX3070\RTX3070\Program.cs:line 29 at RTX3070.Program.(String[] args) Blockquote

What can i do which file i need to change and what to change i have no idea. And Tanju user is not me, my friends name