With this configuration the editbox will not render.
If I comment out all of pbckcode only having autolink I can't paste any text into the editbox. Could it be that other plugins do not work? Or did I misconfig something?
Not sure if you still need it but it might help someone in future. You need to use config string as described here: CKEditor Documentation. In your case:
'extraPlugins' => 'pbckcode,autolink',
Just played around with other extensions like autolink or autoembed. I did it exactly in the way you showed for pbckcode (which works for me!).
With this configuration the editbox will not render.
If I comment out all of pbckcode only having autolink I can't paste any text into the editbox. Could it be that other plugins do not work? Or did I misconfig something?