I used your plug-in (Facebook page publist) almost one year without any errors. But there is an error from yesterday ... I found new version (Facebook page publist 2) - so I installed it.
Now, there is some problem with Granting Access:
Some or all access permissions are missing. Please click the button Grant access rights! and authorize the plugin to post to your Facebook profile or page. [Error occured at line 778]
I tried everithing ... Disable/enable plugin, regenerate FB App secreat. Still the same error.