exception error

[marvinc57]

LaserGrbl v7.14.0.0
Grbl v1.1f
Wrapper: UsbSerial
Win 11, Home, 10.0.26100.0 (7)
CLR: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\mscorlib.dll 4.8.9290.0 built by: NET481REL1LAST_C

TypeOf exception [System.ObjectDisposedException]
Exception message [Safe handle has been closed]
Exception source [mscorlib], thread [Main Thread]
Exception method [Void DangerousAddRef(Boolean ByRef)]

----------- stack trace -----------
at System.Runtime.InteropServices.SafeHandle.DangerousAddRef(Boolean& success)
at System.StubHelpers.StubHelpers.SafeHandleAddRef(SafeHandle pHandle, Boolean& success)
at Microsoft.Win32.UnsafeNativeMethods.GetOverlappedResult(SafeFileHandle hFile, NativeOverlapped* lpOverlapped, Int32& lpNumberOfBytesTransferred, Boolean bWait)
at System.IO.Ports.SerialStream.EventLoopRunner.WaitForCommEvent()
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()