Originally Posted by peegee
Any idea why I would get this error after installing the plugin and attempting a restart?
I'm running v0.7.17, and no I can't upgrade to the latest version at the moment...
You need a more recent version of Calibre. The main plugin thread says 0.7.34 is needed for the plugins so I assume it wasn't until then that plugins were fully supported, at least the way we're using them. I've only tested on 7.40.
Hopefully you can upgrade and try again, if there isn't an issue causing you not to upgrade.