系统返回代码 256

Question

从今天早上开始，我甚至无法编译最简单的代码。我不知道为什么会产生这些错误

    \documentclass[preview, border=1pt, convert={outext=.png}]{standalone}
    \usepackage{amsfonts}
    \usepackage{mathtools}
    \usepackage{amsmath,esint}
    \usepackage{amssymb}
    \usepackage{siunitx}
    \usepackage{braket}
    \usepackage[utf8]{inputenc}
    \begin{document}
    \begin{equation*}
    W_{12} = \int_1^2
    \end{equation*}
    \end{document}

我得到：

    [1{/usr/share/texlive/texmf-dist/fonts/map/pdftex/updmap/pdftex.map}]
    (./formula.aux) )</usr/share/texlive/texmf-dist/fonts/type1/public/amsfonts/cm/
    cmmi10.pfb></usr/share/texlive/texmf-dist/fonts/type1/public/amsfonts/cm/cmr10.
    pfb></usr/share/texlive/texmf-dist/fonts/type1/public/amsfonts/cm/cmr7.pfb>
    !pdfTeX error: pdflatex (file esint10.pfb): cannot open Type 1 font file for reading
        ==> Fatal error occurred, no output PDF file produced!
        system returned with code 256
        convert: unable to open image `formula.pdf': No such file or directory @ error/blob.c/OpenBlob/2761.
        convert: no images defined `formula.png' @ error/convert.c/ConvertImageCommand/3258.
        system returned with code 256


Class standalone Warning: Conversion unsuccessful!
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(standalone)              conversation software or the file permissions!