More input...
OK you have 1.7.6 of the plugin.
What OS?
What version NUMBER of Calibre (
Latest will be wrong in a few days

)
Has this PI ever worked? Preferences: Plugins: <find plugin name in the list>: Remove Plugin (button, lower right)
THEN (remove leaves settings) Exit Calibre
open the
Calibre Configuration Folder/Plugins: and remove the 3
'search the internet' files
Start Calibre: Help:Get Plugins and get a fresh copy of this PI