Agent Token Expiration

PowerShell Universal
1

I just wanted to post an error message here in case someone else is looking for it in the future. When I was doing my searching through issues and the forum, I didn’t come across anything.

If you receive an error on your agents saying something like “Error getting negotiation response” or “Invalid negotiation response received”, check to see if your agent token has expired!

Error log 
2025-05-19 08:04:13.843 -04:00 [ERR] Failed to start connection. Error getting negotiation response from '"https://psu.example.com/autheventhub?group=EventHubName"'.
System.IO.InvalidDataException: Invalid negotiation response received.
 ---> System.Text.Json.JsonReaderException: '<' is an invalid start of a value. LineNumber: 2 | BytePositionInLine: 0.
   at System.Text.Json.ThrowHelper.ThrowJsonReaderException(Utf8JsonReader& json, ExceptionResource resource, Byte nextByte, ReadOnlySpan`1 bytes)
   at System.Text.Json.Utf8JsonReader.ConsumeValue(Byte marker)
   at System.Text.Json.Utf8JsonReader.ReadFirstToken(Byte first)
   at System.Text.Json.Utf8JsonReader.ReadSingleSegment()
   at System.Text.Json.Utf8JsonReader.Read()
   at Microsoft.AspNetCore.Internal.SystemTextJsonExtensions.CheckRead(Utf8JsonReader& reader)
   at Microsoft.AspNetCore.Http.Connections.NegotiateProtocol.ParseResponse(ReadOnlySpan`1 content)
   --- End of inner exception stack trace ---
   at Microsoft.AspNetCore.Http.Connections.NegotiateProtocol.ParseResponse(ReadOnlySpan`1 content)
   at Microsoft.AspNetCore.Http.Connections.Client.HttpConnection.NegotiateAsync(Uri url, HttpClient httpClient, ILogger logger, CancellationToken cancellationToken)