PDF export fails with pdflatex and LuaTeX

[Martin Weise]

On 11.02.20 19:57, Paul A. Rubin wrote:
> On 2/11/20 11:34 AM, Martin Weise wrote:
>>
>> LaTeX.cpp (658): Log line: )) (/home/martin/Desktop/HelloWord.aux)
>> LaTeX.cpp (658): Log line: \openout1 = `HelloWord.aux'.
>>
> It seems to have grabbed an existing .aux file from your desktop (as
> opposed to generating a clean one in the LyX temp directory). Is there
> anything odd in the desktop .aux file?
>
> Paul
>
\relax
\babel at aux{english}{}

That's all there is. And even if I delete the aux file, LyX can't create
a pdf.