I viewed the properties of a conditional and now it will not work. Why???

I checked your form https://www.jotform.com/63015048523145 and understand that you are referring to the conditions linked to the fields - "Job Status" and "Materials".

When I checked this form, I found that the conditions are working well. Please let us know what kind of error are you facing here so that we can replicate the same from our end also.