Read data from uploaded file (not csv)

I am currently using Kantu to automatize file upload.

My test case is: when I upload the file (.xml), the data from it is supposed fill out the form in the website. (because there are too many data to input, I just load them from a file)

When I run the test, the file is uploaded, but the data is not read/shown in the website.

This makes a problem for the next steps: meaning I have to work with the loaded data, but I can’t because there is no data.

Is there a workaround for this?