Report - Custom File name Variable (Decapricated)

Hi friends

I have created this Report with a custom “name” and used a variable

This image below is my old configuration.
And it still working If I don’t change anything.
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I’m trying to replicate the same structure in another workflow, but with no success.

*Using the same configuration, doesn’t work
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*This image is: 'I’m trying to config the variable and getting an error.
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I think this is a new config to browser the location, where I can write the file name, but not a custom file name with variable.

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