Missing file when compiling

Upon compiling the new qt-creator 4.12 from the master branch I get the following error:

In file included from cpp/formclasswizardpage.cpp:27:
.uic/ui_formclasswizardpage.h:18:10: fatal error: utils/newclasswidget.h: No such file or directory
#include <utils/newclasswidget.h>
^~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.

and will not compile... I tried looking for the file on the branch here: https://code.qt.io/cgit/qt-creator/qt-creator.git/tree/src/libs/utils/newclasswidget.cpp

And it says it is not found.