[dvipdfmx] missing annotation rectangle if the box contains no glyph

[Ulrike Fischer]

>>> Consider the following example:
>>>
>>>    \documentclass[dvipdfmx]{article}

> Processing that example with TeX Live 2020 PdfTeX, I am told :

>> ! LaTeX3 Error: Backend request inconsistent with engine: using 'pdfmode'
>>

> What engine should I be using ?

We are here on the dvipdfmx list, and the document starts with

\documentclass[dvipdfmx]{article}

So use latex or xelatex.

-- 
Mit freundlichen Grüßen
Ulrike Fischer