[qgis-qwc2] Item information not displayed

[Francisco Danubio Salas Rosette]

I am creating a project from https://github.com/qgis/qwc2-demo-app
My layers are already displayed, but when I request information about an
element, the window appears empty, when I check with F12 , there is a
GetFeatureInfo request that returns the data. What am I missing so that
this data is shown in the information window?

Thank you very much
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