System.IO.IOException: Illegal byte sequence : '/Users/runner/actions-runner/cached/_diag/Worker_20260727-145623-utc.log' at System.IO.RandomAccess.WriteAtOffset(SafeFileHandle handle, ReadOnlySpan`1 buffer, Int64 fileOffset) at System.IO.Strategies.OSFileStreamStrategy.Write(ReadOnlySpan`1 buffer) at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder) at System.Diagnostics.TextWriterTraceListener.Flush() at GitHub.Runner.Common.HostTraceListener.WriteLine(String message) at System.Diagnostics.TraceSource.TraceEvent(TraceEventType eventType, Int32 id, String message) at GitHub.Runner.Common.HostContext.GetDirectory(WellKnownDirectory directory) at GitHub.Runner.Common.HostContext.GetDirectory(WellKnownDirectory directory) at GitHub.Runner.Common.HostContext.GetDirectory(WellKnownDirectory directory) at GitHub.Runner.Common.PagingLogger.Initialize(IHostContext hostContext) at GitHub.Runner.Common.HostContext.CreateService[T]() at GitHub.Runner.Worker.ExecutionContext.CreateChild(Guid recordId, String displayName, String refName, String scopeName, String contextName, ActionRunStage stage, Dictionary`2 intraActionState, Nullable`1 recordOrder, IPagingLogger logger, Boolean isEmbedded, List`1 embeddedIssueCollector, CancellationTokenSource cancellationTokenSource, Guid embeddedId, String siblingScopeName, Nullable`1 timeout, Boolean isBackground, String backgroundControlType, String[] backgroundControlStepIds, String parallelGroupId) at GitHub.Runner.Worker.JobExtension.FinalizeJob(IExecutionContext jobContext, AgentJobRequestMessage message, DateTime jobStartTimeUtc) at GitHub.Runner.Worker.JobRunner.RunAsync(AgentJobRequestMessage message, CancellationToken jobRequestCancellationToken) at GitHub.Runner.Worker.JobRunner.RunAsync(AgentJobRequestMessage message, CancellationToken jobRequestCancellationToken) at GitHub.Runner.Worker.Worker.RunAsync(String pipeIn, String pipeOut) at GitHub.Runner.Worker.Program.MainAsync(IHostContext context, String[] args) System.IO.IOException: Illegal byte sequence : '/Users/runner/actions-runner/cached/_diag/Worker_20260727-145623-utc.log' at System.IO.RandomAccess.WriteAtOffset(SafeFileHandle handle, ReadOnlySpan`1 buffer, Int64 fileOffset) at System.IO.Strategies.OSFileStreamStrategy.Write(ReadOnlySpan`1 buffer) at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder) at System.Diagnostics.TextWriterTraceListener.Flush() at GitHub.Runner.Common.HostTraceListener.WriteLine(String message) at System.Diagnostics.TraceSource.TraceEvent(TraceEventType eventType, Int32 id, String message) at GitHub.Runner.Common.Tracing.Error(Exception exception) at GitHub.Runner.Worker.Program.MainAsync(IHostContext context, String[] args)