The cef.log shows the following errors:
[0502/130251:ERROR:ipc_channel_win.cc(217)] pipe error: 109[0502/130314:ERROR:ipc_channel_win.cc(512)] pipe error: 232
[0502/130544:ERROR:ipc_channel_win.cc(217)] pipe error: 109
[0502/130556:ERROR:ipc_channel_win.cc(512)] pipe error: 232
[0502/130821:ERROR:ipc_channel_win.cc(512)] pipe error: 232
[0502/130944:ERROR:ipc_channel_win.cc(512)] pipe error: 232
What is the underlying cause?