Since recently deleted from StackOverflow for being off topic, I would like to repost the following question (originally asked by User Фадиме Бекмамбетова):
When using the LatexIt! extension for thunderbird on Ubuntu I get the error:
LatexIt! run report... *** Found expression $a$ convert failed with error code 1. Aborting. Possible explanations include: - you're running Windows, and you didn't install Ghostscript - you're running OSX, and you didn't launch Thunderbird from a Terminal Please see http://github.com/protz/LatexIt/wiki
When running from inside a terminal, I get
This is pdfTeX, Version 3.14159265-2.6-1.40.16 (TeX Live 2015/Debian) (preloaded format=latex) restricted \write18 enabled. entering extended mode This is dvips(k) 5.995 Copyright 2015 Radical Eye Software (www.radicaleye.com) ' TeX output 2018.10.12:1055' -> /tmp/tblatex-1.ps </usr/share/texlive/texmf-dist/dvips/base/tex.pro> </usr/share/texlive/texmf-dist/dvips/base/texps.pro>. </usr/share/texlive/texmf-dist/fonts/type1/public/amsfonts/cm/cmmi10.pfb> convert: not authorized `/tmp/tblatex-1.ps' @ error/constitute.c/ReadImage/412. convert: no images defined `/tmp/tblatex-1.png' @ error/convert.c/ConvertImageCommand/3210.
How to fix that?