TypeError: activeObj is null
at Annotator.prototype.onMouseMove (/js/annotate.js:845:9)
at Annotator.prototype.bindEvents/< (/js/annotate.js:578:14)
at r (/js/fabric.min.js:1:1963)
at _handleEvent (/js/fabric.min.js:1:102663)
at __onMouseMove (/js/fabric.min.js:1:105942)
...
(1 additional frame(s) were not displayed)