Cura 3.3.0 wont slice

[jurgen975 0]

With some parts cura does not have a problem but other parts the programe wont slice what is causing this?

[gr5 2,210]

Look at the part in xray view.  If you see any red then that si the problem.  Is it your own part or is it someone elses?  If it is yours, then what CAD software did you use?  Please show a photo of what the part looks like in the 3 views: normal/xray/slice

[jurgen975 0]

These are just 2 files that wont slice in x-ray format and as you can see there is no read