Incorrectly configured CSS for Emoji-extended plugin

[finid]

From the NodeBB error.log file, I'm getting this error message:

{"level":"error","message":"[plugins/nodebb-plugin-emoji-extended] This plugin's CSS is incorrectly configured, please contact the plugin author.","timestamp":"2014-03-16T16:12:20.426Z"}

{"level":"error","message":"[plugins/nodebb-plugin-emoji-extended] This plugin's CSS is incorrectly configured, please contact the plugin author.","timestamp":"2014-03-16T16:12:24.269Z"}

{"level":"error","message":"[app] Encountered Uncaught Exception: meta is not defined","timestamp":"2014-03-16T16:12:24.693Z"}

I'm not sure if the last line has anything to do with the plugin, but it warrants attention too. Paging @frissdiegurke, who I believe is the plugin's author.

[frissdiegurke]

Does everything work as expected?
Do you have the newest version of the plugin (0.2.2-1)?
I can't reproduce the error and since there is no use of CSS within emoji-extended anymore...