@arymaynart Did you manage to solve this? I’m having the same problem and the solution from @yithemes doesn’t work for me.
Thanks!
Had the same issue. Was resolved by editing /admin/class-productsize-chart-admin.php and replacing Line 513: $chart_1[‘chart-content’]=sanitize_text_field( $_POST[‘chart-content-1’] ); with $chart_1[‘chart-content’]=stripslashes( $_POST[‘chart-content-1’] );
Same problem here. Did you manage to find a solution? Thanks!