Graph example doesn't compile about geometry HOT 1 OPEN

here is the message I get:
Arduino: 1.8.19 (Windows 10), TD: 1.57, Board: "Teensy 3.2 / 3.1, Serial, 96 MHz (overclock), Faster, US English"
In file included from C:\Users\Charles\Documents\Git2\TeenAstro\libraries\Geometry\examples\PoseGraph\PoseGraph.ino:1:0:

PoseGraph.h:34: error: array must be initialized with a brace-enclosed initializer

 Geometry::Pose* transforms[max_frames][max_frames] = {NULL};

In file included from C:\Users\Charles\Documents\Git2\TeenAstro\libraries\Geometry\examples\PoseGraph\PoseGraph.cpp:1:0:

PoseGraph.h:34: error: array must be initialized with a brace-enclosed initializer

 Geometry::Pose* transforms[max_frames][max_frames] = {NULL};

                                                           ^

array must be initialized with a brace-enclosed initializer

from geometry.