Object not getting sliced

I have assembled a few models and one doesn’t show up when sliced.When not assembled it shows up but it doesn’t work well cuz the color of them mixes. Gonna add the picture of the sliced part in the comments cuz as a new user I can’t upload more than one photo

Could you share a link to the file you are slicing?

Hi. I managed to fix it somehow. Idk what I changed cuz I tried like 10 things at once. And I accidentally overwrote the not working file