SummaryError in the modification .css
I am trying to make the modification for a widget of the TextInput.css file that is in the following path:
Core - Widgets - Input - TextInput - ThemesPackageSource - Standard - WidgetCss - TextInput.css
But when I want to modify the .css file I get the error that I attached.
Does anyone know the reason for this error? I'd be really grateful!