If you have an iPad with iOS 9 which does not yet have NuORDER loaded on it, you may see the following screen when you first install or launch NuORDER.
If you see the screen above, you will need to tell your iPad to "trust" the NuORDER app. Note: You will only need to do this once.
To "trust" the NuORDER app:
1) Tap Settings > General > Profiles or Profiles & Device Management.
You will see a profile for NuORDER under the "Enterprise App" heading.
2) Tap on NuORDER and then tap "Trust NuORDER"
More information can be found on this Apple Support Article.