Canvg error fails entire process

[krose422]

Image with issue: https://squareup.com/store/gallatin-wellness/.

Instead of responding with the error from canvg.js, the entire process fails with the following:

[xmldom warning] attribute "�Z������e츮" missed value!! "�Z������e츮" instead2!!
@#[line:3,col:273]
[xmldom error] element parse error: Error: invalid attribute:�Z��~����e츮
@#[line:3,col:273]
[xmldom warning] attribute "�." missed value!! "�." instead2!!
@#[line:14,col:71]
[xmldom warning] attribute "0��䄀���F" missed value!! "0��䄀���F" instead2!!
@#[line:14,col:71]
[xmldom error] element parse error: Error: invalid attribute:0��䄀���F
@#[line:14,col:71]
[xmldom error] element parse error: Error: invalid tagName:�Y^���
@#[line:14,col:162]
[xmldom warning] attribute "�r�" missed value!! "�r�" instead2!!
@#[line:14,col:197]
[xmldom warning] attribute "�" missed value!! "�" instead2!!
@#[line:14,col:197]
[xmldom warning] attribute "��" missed value!! "��" instead2!!
@#[line:14,col:197]
[xmldom warning] attribute "�" missed value!! "�" instead2!!
@#[line:14,col:197]
[xmldom warning] attribute "����{�)Zf�D��$u��" missed value!! "����{�)Zf�D��$u��" instead2!!
@#[line:14,col:197]
[xmldom error] element parse error: Error: invalid attribute:����{�)Zf�D��$u��
@#[line:14,col:197]
[xmldom error] element parse error: Error: invalid tagName:��3�b
@#[line:14,col:297]
[xmldom warning] attribute "b���xa[��+�.��CK���C��WK����甉B#�c��#3" missed value!! "b���xa[��+�.��CK���C��WK����甉B#�c��#3" instead2!!
@#[line:18,col:4]
[xmldom error] element parse error: Error: invalid attribute:b���xa[��+�.��CK���C��WK����甉B#�c��#3
@#[line:18,col:4]
[xmldom error] element parse error: Error: invalid tagName:
@#[line:19,col:12]v