Enclosure for CFD keeps failing

I’m trying to make an enclosure to run a CFD test but I keep getting this error. Anyone know whats gone wrong or how I can fix it?

Please always include the URL to your project. This way we can have a look at your setup and what is happening.

Figured out that theres was an issue with my imported file

Hey there!

I agree with you that the imported geometry should be improved. Please turn all the sheet bodies into solids, by thickening or enclosing.

Also, if you can, Parasolid or STEP formats are preferred over IGES.