Thanks for renewing your support.
We indeed no longer include the GNU Make executable with our toolchains. Instead, we have switched them to using make.exe from the VisualGDB directory. This should automatically apply to newly created projects. However, if you have created your project with an older version of toolchain, it would need to be updated manually. If this is the case, please try setting the Make path in VisualGDB Project Properties -> Make Build Settings to $(VISUALGDB_DIR)\make.exe.
You can also simply copy make.exe from the VisualGDB directory to the toolchain directory if you do not want to edit the project file.