Also using Win 10 64bit
Tried yesterday couldn't duplicate.
Got it again today using clip 2.
Error info: Critical: OleSetClipboard: Failed to set mime data (text/plain) on clipboard: COM error 0xffffffff800401d0 (Unknown error 0x0ffffffff800401d0) (The parameter is incorrect.)
Sigil version: 0.9.6
Runtime Qt: 5.4.2
Compiled Qt: 5.4.2
Platform: Windows SysInfo ID 240
!st part of sisigil_clips.ini:
1\Name=Clips Help
1\Text=Right click for menu to add groups and entries. Edit or re-order any item. Use right click in editor to select which entry to paste.
2\Name=Chapter
2\Text="Chapter "
3\Name=Find ok
3\Text=\\bok\\b
4\Name=Find Ok
4\Text=\\bOk\\b
5\Name=LargeFont
5\Text="<span style=\"font-size: x-large;\">\\1</span>"
6\Name=Dots
6\Text="<p style=\"text-align: center;\">\x2022 \x2022 \x2022</p>"
7\Name=Example Clips/h1
7\Text=<h1>\\1</h1>
8\Name=Example Clips/h2
8\Text=<h2>\\1</h2>
Yes the official build.
Nothing else open except Firefox, Sigil and File Explorer.