check for updates error

[jaeyoi]

When I try to check for updates, I got this message.

"The network operation failed with the following error: Unknown reason"

.virtualbox/selectorwindow.txt

VirtualBox GUI VM Selector Window 5.0.20 r106931 win.amd64 (Apr 28 2016 14:04:10) release log
00:00:00.452344 Log opened 2016-06-04T03:23:51.189935100Z
00:00:00.452344 Build Type: release
00:00:00.452344 OS Product: Windows 10
00:00:00.452344 OS Release: 10.0.10586
00:00:00.452344 OS Service Pack: 
00:00:00.467968 DMI Product Name:                                 
00:00:00.467968 DMI Product Version:                                 
00:00:00.467968 Host RAM: 16361MB total, 14362MB available
00:00:00.467968 Executable: C:\Program Files\Oracle\VirtualBox\VirtualBox.exe
00:00:00.467968 Process ID: 6096
00:00:00.467968 Package type: WINDOWS_64BITS_GENERIC
00:00:00.483594 GUI: UIMediumEnumerator: Medium-enumeration started...
00:00:00.545650 GUI: UISelectorWindow: Geometry loaded to: Origin=575x305, Size=770x550
00:00:00.608154 refreshCertificates/#3: RTCrStoreCertExportAsPem unexpectedly failed with VERR_INVALID_PARAMETER

[Frank Mehnert]

Please reoepn if still relevant with VBox 5.1.22.