Problem Using Math Nodes

Hello everyone,
I have created a radar style animation in Blender using various nodes, including math node, and all works fine within the blender viewport. But when I export the .gltf file, the animation does not work. I just wondered if I am doing something wrong, or, maybe my node setup is not fully compatible with the current version of Verge 3d? If that is the case, maybe someone could suggest an alternative method for achieving a similar result in Verge 3d?

I have attached my blend file below, and any help with this would be greatly appreciated.

Many thanks in advance.