Hello Nick,

You can try to disable either on autoposting and check whether the error still exist. Let say you have disabled facebook and the error is gone, you might want to check your facebook app setting. Here is the way to troubleshoot for facebook and Twitter:

Facebook:
1. Edit your Facebook application.
2. Check Site URL, App Domain make sure they are the same as your site domain (http://www.yoursite.com and http://yoursite.com make a big difference)
3. Reset the App Secret
4. Go to the EasyBlog -> Autoposting -> Advanced Settings page and revoke the access.
5. Go though the EasyBlog -> Autoposting -> Step by step guide and re-enter the new key and reauthenticate the Facebook access.

Twitter:
1. Edit your Twitter application.
2. Check website URL, Calback URL make sure they are the same as your site domain (http://www.yoursite.com and http://yoursite.com make a big difference)
3. Check if the Access level is Read and Write
4. Check if "Allow this application to be used to Sign in with Twitter"
is ticked under Settings
5. Reset the keys then refresh the page
6. Generate a new access token
7. Go to the EasyBlog -> Autoposting -> Advanced Settings page and revoke the access.
8. Go though the EasyBlog -> Autoposting -> Step by step guide and re-enter the new keys and reauthenticate the Twitter access.

Hope this helps.