Compiling error. FAILED: src/app/.xml.h C:/aseprite/build/src/app/.xml.h

Hi, this is my first time compiling a software and the ninja command refused to work at the end. This is what the command prompt says.

C:\aseprite\build>ninja aseprite
[1/2] Generating .xml.h
FAILED: src/app/.xml.h C:/aseprite/build/src/app/.xml.h
cmd.exe /C “cd /D C:\aseprite\build\src\app && C:\aseprite\build\bin\gen --input C:/aseprite/data/widgets/._about.xml --widgetid > C:/aseprite/build/src/app/.xml.h.tmp && “C:\Program Files\CMake\bin\cmake.exe” -E copy_if_different C:/aseprite/build/src/app/.xml.h.tmp C:/aseprite/build/src/app/.xml.h”
Missing value in ‘–widgetid=’ option specification
ninja: build stopped: subcommand failed.

I have been searching everywhere for solutions and nothing seems to work. Some help would be appreciated. Thanks!