File is universal (3 slices) issue

File is universal (3 slices) but does not contain a(n) armv7s slice error for static libraries on iOS

Project -> Build Settings -> remove the architecture from "valid architectures"

You can use this as a temporary solution until the library has been updated. You have to remove the architecture from your main project,not from the library.

Alternatively, you can set the flag for your debug configuration's "Build Active Architecture Only" to Yes. Leave the release configuration's "Build Active Architecture Only" to No, just so you'll get a reminder before releasing that you aught to upgrade any 3rd party libraries you're using.