I attempted to save the .3mf project so that it wouldn't need to be scaled by other end-users. If you download and it is not scaled (you will definitely know if it's not), just scale down to 10% on all axis. Correct size would be 108.08mm on the X axis, 97.40mm on the Y axis, and 30.00mm on the Z axis.
The author remixed this model.
While printing the Hexawall I found that the inner light tile should not have had a solid bottom. I removed the bottom so that the lights can shine properly. I had to scale the model down (Not Unified) to 10% on all axis after the removal. I don't know what caused this as I did not change the parameters. After the scale the model printed perfectly and without error. Cover photo shows the difference.