AtherysRPG Skill Graph Editor will not allow me to download a modified uploaded skill graph

[HaedHutner]

Description: When attempting to download a skill graph which I have modified ( by deleting a node ), the skill graph editor spews out the following error in console:

Reproduction Steps: How do we re-create it?

1. Upload a skill graph
2. Delete a node ( any node )
3. Attempt to download the modified skill graph

[HaedHutner]

The issue is somehow related to the links between nodes not being cleared from the internal js object used to track the graph when deleting a node. The node itself is deleted, but perhaps the links still remain, and when it attempts to serialize the graph into json, it tries to also serialize a non-existant node because there's a remnant link in there which is now referencing null.