How to get the ParseError from the auto-render extension?

[q2apro]

I am using the Auto-render extension heavily (github).

I use the error handling like this:

renderMathInElement(document.body, {
	delimiters: [
		{left: "$$", right: "$$", display: true},
		{left: "\\(", right: "\\)", display: false},
		{left: "\\[", right: "\\]", display: false},
	],
	macros: {
		":": "{\\char`:}",
		",": "{\\char`,}",
		"·": "{\\char`·}",
	},
	fleqn: true,
	errorCallback: function(error) 
	{
		// LATEX ERROR FOUND - Katex cannot parse
		// show error box bottom right
		var $div = $("<div>", {id: "dialog-box-error", "class": "error-bg" });
		// $div.click( function(){ $(this).remove() });
		$('.main').append($div);
		$div.text(error.replace('\\(', '').replace('\\)', '').replace(' with', ''));
		//console.log(error);
	},
	preProcess: (math) => math.replace(/&nbsp;/g, ' '),
});
console.log('Katex rendered');

With autorender I get (example):

KaTeX auto-render: Failed to parse a_N(150 \frac{ \mbox {km}}{\text{h}})=\frac{v^2}{r}=\frac{ \left(150 \frac{ \mbox {km}}{\text{h}} \right) ^2 }{200\text{m} }= \frac{\left( 150\frac{1000\mbox {m}}{3600\text{s}} \right)^2 }{200\text{m}} \approx 8,681 \frac{\text{m}}{\text{s}^2}KaTeX auto-render: Failed to parse s=v_0 \cdot t + \frac{1}{2}a_T \cdot t^2=120 \frac{\mbox {km}}{\text{h}} \cdot 3\text{s} + \frac{1}{2} 2,778\frac{\text{m}}{\text{s}^2} \cdot (3\text{s})^2=112,5\text{m} with

With Katex error handling, however, I get:

KaTeX auto-render: Failed to parse s=v_0 \cdot t + \frac{1}{2}a_T  \cdot t^2=120 \frac{\mbox {km}}{\text{h}} \cdot 3\text{s} + \frac{1}{2} 2,778\frac{\text{m}}{\text{s}^2} \cdot (3\text{s})^2=112,5\text{m} with ParseError: KaTeX parse error: Undefined control sequence: \mbox at position 53: … t^2=120 \frac{\̲m̲b̲o̲x̲ ̲{km}}{\text{h}}…

The important part is missing:

ParseError: KaTeX parse error: Undefined control sequence: \mbox at position 53: … t^2=120 \frac{\̲m̲b̲o̲x̲ ̲{km}}{\text{h}}…

How to get the ParseError message in the callback?

REF: #2616