Hi Aditya,
This warning appears when Studio Pro cannot read the package.xml inside your custom widget. It usually happens due to one of the following reasons:
Fix: Correct folder + package.xml structure
Make sure your widget ZIP contains (example):
CustomWidget/
widget/
widget.js
widget.xml / package.xml
package.xml
Tips:
Always zip the widget root folder (not the inner files directly)
Validate your package.xml for XML errors
Restart Studio Pro after replacing the widget
Once structure is valid and XML is readable, the warning will disappear, and widget will load fine.