I'm getting this after slicing and trying to save.
I have the Longer 3D orange 10 LGS windows 64bit plugin v1.3 from here: https://drive.google.com/drive/u/0/folders/1dn_52aYwDXnhOiz9JAKOKwRChXHkfIkR?fbclid=IwAR2XyvSs_jCWwqXymOh9ZEvcuyKNuj-ibnmbLAmfOsZMWzjJdke71kxANwQ
Chitubox is v1.6.2.