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HI, I'm a beginning user for COMSOL, using 6.1 version. My simulation have been work well, however, today my project suddenly report errors, even if I change nothing. i tried to switch to different projects, even empty project, or restart my PC, but the problem persists. The error information reads:

2023-11-13T14:50:32.958+01:00 Using locale: zh_CN 2023-11-13T14:50:33.508+01:00 InitNativeRenderDevice with screenDpi:96 2023-11-13T14:50:33.508+01:00 C:\Program Files\COMSOL\COMSOL61\Multiphysics\ext\graphicsmagick\win64;C:\Program Files\COMSOL\COMSOL61\Multiphysics\lib\win64;C:\Program Files\COMSOL\COMSOL61\Multiphysics\bin\win64;C:\Program Files\COMSOL\COMSOL61\Multiphysics\java\win64\jre\bin;C:\Program Files\COMSOL\COMSOL61\Multiphysics\ext\dcm\win64;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Git\cmd;C:\Program Files\Wolfram Research\WolframScript\;C:\Users\go69dug\AppData\Local\Microsoft\WindowsApps; 2023-11-13T14:53:11.084+01:00 Arithmetic operation resulted in an overflow. 2023-11-13T14:53:11.086+01:00 at System.Windows.Shell.WindowChromeWorker._HandleNCHitTest(WM uMsg, IntPtr wParam, IntPtr lParam, Boolean& handled) at System.Windows.Shell.WindowChromeWorker._WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at System.Windows.Interop.HwndSource.PublicHooksFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler) 2023-11-13T14:53:13.171+01:00 Arithmetic operation resulted in an overflow. 2023-11-13T14:53:13.171+01:00 at System.Windows.Shell.WindowChromeWorker._HandleNCHitTest(WM uMsg, IntPtr wParam, IntPtr lParam, Boolean& handled) at System.Windows.Shell.WindowChromeWorker._WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at System.Windows.Interop.HwndSource.PublicHooksFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Can anyone help me out? Thanks!