Hello,
when I try to preview a txt or html attachment in Outlook 2019 x64 (on Win 10 20H2 x64) email I've got an error:
This file cannot be previewed because of an error with the following previewer:
Windows TXT previewer (Html Previewer)
To open this file in its own program, double-click it.
And it is ok with xlsx, docx, pdf and images previews.
PreviewHandlers key is in the Registry and seems to be ok.
Also I have no previews at all (blank preview without any text, except images and videos) in Explorer Preview pane (for what it's worth).
