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Hello,

We are going to check the undefined index. As a workaround please add @ when you invoke replaceChartData to hide the notice:

@$docxx->replaceChartData($source, $target, $data);

Although this isn't a good practice, it will avoid the notice (and other errors that the method may show as well, so please use it carefully and only in this line until a new package is released).

Laravel (as Symfony and other PHP frameworks) throws an exception in the dev environment when a notice is thrown. You can avoid it changing the default configuration, but we are going to check and fix the undefined index notice.

Regards.