problems printing in cura

[firebadbobb 0]

I downloaded a gun from thingiverse. btw I'm am new to all of this. hello. I noticed it was an obj. it had problems. I converted a piece to stl, and the same thing happened. I am getting an error, and I try to fix the issues but it still says I cant slice. what am I doing wrong? here is the issue:

 

 

 

 

[obewan 37]

On the top left, click settings/configure setting visibility, then tick the 'check all' box.

now under 'support' check the value you have set for gradual support infill steps.

 

[firebadbobb 0]

ok, I have checked all and found that there are no values for support infill steps. what should the values be? and should I set values for everything in the support option? thingiverse didn't have instructions for that. also I am not seeing the supports in the viewer. thank you