Does not insert the returned mathjax object into the canvas

[ctzurcanu]

error is:
Uncaught TypeError: Cannot read property 'tagName' of null svgcanvas.js:7244
ungroupSelectedElement svgcanvas.js:7244
(anonymous function) VM1876:107
CALLBACK.execute MathJax.js?config=TeX-AMS-MML_SVG.js&=1399037495921:19
(anonymous function) VM2291:2
BASE.Object.Subclass.Process MathJax.js?config=TeX-AMS-MML_SVG.js&=1399037495921:19
BASE.Object.Subclass.call MathJax.js?config=TeX-AMS-MML_SVG.js&=1399037495921:19
WAITEXECUTE MathJax.js?config=TeX-AMS-MML_SVG.js&=1399037495921:19
(anonymous function) VM2290:2
BASE.Object.Subclass.Process MathJax.js?config=TeX-AMS-MML_SVG.js&=1399037495921:19
BASE.Object.Subclass.call MathJax.js?config=TeX-AMS-MML_SVG.js&=1399037495921:19
WAITEXECUTE MathJax.js?config=TeX-AMS-MML_SVG.js&=1399037495921:19
(anonymous function) VM2297:2
WAITEXECUTE MathJax.js?config=TeX-AMS-MML_SVG.js&=1399037495921:19
(anonymous function) VM2293:2
MathJax.Object.Subclass.Execute MathJax.js?config=TeX-AMS-MML_SVG.js&=1399037495921:19
a.Ajax.loadComplete MathJax.js?config=TeX-AMS-MML_SVG.js&=1399037495921:19
(anonymous function) Main.js:19

[ctzurcanu]

the mathjax object was extant:

root: Object
SVGdata: Object
data: Array[1]
0: Object
SVGdata: Object
data: Array[1]
0: Object
SVGdata: Object
data: Array[1]
displaystyle: true
inherit: Object
parent: Object
scriptlevel: 0
texClass: 0
proto: Object
length: 1
proto: Array[0]
inferred: true
inherit: Object
notParent: true
parent: Object
texClass: 0
proto: Object
length: 1
proto: Array[0]
display: "block"
inputID: "MathJax-Element-1"
prevClass: -1
prevLevel: undefined
texClass: 0