a bit more information about your setting may would help I tried to slice it and it works fine (SR-G beat me to it). But when I tried to slice it with the 0.8 nozzle with stock preset it fails. Reason is that the line width of the honeycomb is smaller than the 0.82 line width in the stock preset. Change wall-generation to ‘arachne’ and it should work.
as you can see, the line width is set to 0.71 - which is smaller than the 0.82 of the preset and therefore the slicer could not slice it.
Thank you, this is what I just figured, it fails with the 0.8. Strange that I tested before with 0.6 and 0.4 and it was still failing, this time I did reset back to defaults before slicing.
The trick with Arachne also worked. Thank you both!