Hi Bernt, I googled the error and found this: https://tex.stackexchange.com/q/18144/17868
Is it helpful? C. Fuhrman On Mon, Apr 2, 2018, 09:52 Bernt Lie <bernt....@usn.no> wrote: > I just updated MikTeX after some problems with LyX lately. (LyX 2.2.3, > Windows 10, 64 bit). > > > > When trying to preview a LyX document, I get the following error message: > > > > > > When clicking on “Yes”, the following detail pops up: > > > > > > Anyone got a clue? > > > > -Bernt >