SVG power bi chart not showing chart

I am trying to make a sparkline chart with categorical data in power bi. I have used the following code for the chart, but it is not showing me a chart.

 bar table sparkline = 
// static column color - use %23 instead of # for firefox compatibility 
VAR BarColor = "%2301B8AA"
VAR BarOutlineColor = "%23DDDDDD"
VAR BarOutlineWidth = 2
// Obtain number of columns - width genrated based on column count 
VAR BarCount = DISTINCTCOUNT('Virtual Table'[type])
VAR BarWidth = INT(DIVIDE(100,BarCount))

// Obtain overall min and overall max measure values when evaluated for each date
VAR YMinValue = MINX(VALUES('Virtual Table'[type]),CALCULATE(AVERAGE('Virtual Table'[field widget])))
VAR YMaxValue = MAXX(VALUES('Virtual Table'[type]),CALCULATE(AVERAGE('Virtual Table'[field widget])))
VAR YRange = SWITCH(TRUE(),
                    YMinValue >= 0 && YMaxValue >= 0, YMaxValue,
                    YMinValue < 0 && YMaxValue < 0, ABS(YMinValue),
                    YMaxValue + ABS(YMinValue))

VAR SparklineTable = ADDCOLUMNS(
    SUMMARIZE('Virtual Table','Virtual Table'[type]),
        "X",INT(RANKX('Virtual Table','Virtual Table'[type],'Virtual Table'[type],ASC,DENSE)),
        "Y",SWITCH(TRUE(),
                YMinValue >= 0 && YMaxValue >= 0, 100-INT(100 * DIVIDE(AVERAGE('Virtual Table'[field widget]),YMaxValue)),
                YMinValue < 0 && YMaxValue < 0, 0,
                YMinValue < 0 && YMaxValue >= 0 && AVERAGE('Virtual Table'[field widget]) >= 0, INT(100 * DIVIDE(YMaxValue - AVERAGE('Virtual Table'[field widget]),YRange)),
                YMinValue < 0 && YMaxValue >= 0 && AVERAGE('Virtual Table'[field widget]) < 0, INT(100 * DIVIDE(YMaxValue,YRange))
            ),
        "Height", INT(100 * DIVIDE(AVERAGE('Virtual Table'[field widget]),YRange))
        )

// Concatenate X & Y coordinates to build the sparkline
VAR Cols = CONCATENATEX(SparklineTable,"<rect x='" & [X] * BarWidth - BarWidth & 
    "' y='" & [Y] &
    "' width='" & BarWidth & 
    // display slim bar if height = 0
    "' height='" & IF([Height] = 0, 1, ABS([Height])) &
    "' style='fill:" & BarColor & 
    ";stroke-width:" & BarOutlineWidth & 
    ";stroke:" & BarOutlineColor & 
    "' />","")
VAR SVGImageURL =
    "data:image/svg+xml;utf8," & 
    "<svg xmlns='https://www.w3.org/TR/SVG2/' x='0px' y='0px'
     viewBox='0 0 100 100'>" &
     Cols &
     "</svg>"
RETURN SVGImageURL

Instead of a chart, I get description of the chart.