I am running Vaadin 14, and Version 3.0.1. I am not seeing any errors, but

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I am running Vaadin 14, and Version 3.0.1. I am not seeing any errors, but am getting nothing in the downloads, I’ve tried Xls, CSV, and xlsx and the files download, but they are blank.
I am using a GridPro, and have tried it with a standard Grid and neither work. The data is in a list, and is set using grid.addColumn(Person::getName).setHeader(“Name”).setKey() and using an Anchor and StreamResource as is shown in the overview. Am I missing something?
I am not seeing any errors in the console.

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I’m seeing this as well, I have it though where I can download to excel fine on my computer locally but not when my app’s deployed.

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I’m running Docker/Vaadin locally, unfortunately I can’t find any errors.