Add picture issue when exporting Highcharts to pdf - Highcharts warning: Invalid tagName

Solution 1:

It is related to the new Highcharts Security policy. You need to modify the default AST settings:

Highcharts.AST.allowedTags.push('image');
Highcharts.AST.allowedAttributes.push('xlink:href');

Live demo: https://jsfiddle.net/BlackLabel/8snjc6gy/

Docs: https://www.highcharts.com/docs/chart-concepts/security