DPLineStyler, Scribbler, and PrettyPrint all had the same bug, which only affects users of SketchUp 2017 or earlier. Seems that I introduced the bug back in October by calling a Ruby method that wasn’t in the API until SketchUp 2018. Sorry about that!
You can get the corrected versions of the plugins now on Sketchucation, and they should be up on the EW in a week or so. Look for DPLineStyler 2.1.1, Scribbler 2.1.4, and PrettyPrint 2.1.3. Users of later versions of SketchUp (2018+) need not bother with this update.
Thanks, and keep those bug reports coming in!
Dave P