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It could be issue with time to load resource, could you please use the resourceWaiting
to increase time (ms) to wait for resource, here is an example
$report->export()
->settings(array(
"resourceWaiting"=>2000,
))
->pdf(array(
"format"=>"A4",
"orientation"=>"portrait"
))
->toBrowser("report.pdf");
Let us know if it works.
I finally resume this topic that i left behind and resolved my problem. Turns out that i was using Cakephp framework so i had to set the assets path and url to a public folder of my project in the report settings and the colum chart appeared. I had notice that some .js and .css wasn't loading and after some looking into the forum this topic finally helps me.
Thanks for the support.
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