I receive a Ruby Encoder Error?

Remove the Skalp.lic file. And re-activate your Skalp version again with your license activation code.
You can find the Skalp.lice file in your plugins folder ‘Skalp_Skalp’

*Windows – the default location is:
SketchUp 2017: C:\Users\YOUR USERNAME\AppData\Roaming\SketchUp\SketchUp 2017\SketchUp\Plugins

*Mac OS X – the default location is:
Version 2013 and newer: Open a new Finder window, press and hold the Option key on your keyboard, the click Go in the menu bar > Library > Application Support > SketchUp # > SketchUp > Plugins