Help with Blender Animation plugin rig exporting

Hello! I have ran into an issue with a plugin I use to export character rigs into blender to animate with. I have a full video of the issue below:

I use the plugin Blender rig exporter/animation exporter by Den_S for this.
I have never came across this issue with uploading any character model to blender in this way. Is there any way I could possibily fix this? Any problems that could be the issue that causes this error in Blender? Help or options would be greatly appreciated, Thanks!

I haven’t done this before, but most likely it is a corrupted rig, since the error talks about an index out of range, there might be a foreign part in your rig.

Yeah that’s what I thought at first too, although this happens with any model I try it with, even if it’s a brand new model that I load in with the default roblox rig load-in. Not sure what the issue could be.