If you try to import a .json that has keys with front legends, it fails to import. I'll attach a file that cause it, though any file with front legends should replicate the issue.
error.zip
Front legends aren't supported currently, and I haven't figured out a way to support them yet. I will however fix the crashing from front legends and just not have them put into the model.
If you try to import a .json that has keys with front legends, it fails to import. I'll attach a file that cause it, though any file with front legends should replicate the issue. error.zip