update failed - Call function /vantage/framework/includes/open-graph.php on line 131
After updating to latest version
I am getting this error
Fatal error: Call to undefined function mb_strlen() in /wp
-content/themes/vantage/framework/includes/open-graph.php on line 131
what file in child theme will cause it?
it works well with original theme and only breaks with child activted
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