My apologies for the late reply. I was a bit sick.
I've tried uninstalling all of the other plugins, still getting the error. Using the most recent versions of wordpress, buddypress & bbpress on my site.
Fatal error: Using $this when not in object context in /hermes/waloraweb093/b311/moo.litzylowecom/adventures/wp-content/plugins/buddypress-groups-extras/core/loader.php on line 345
My screenshot looks exactly the same as Paularupolo's.
I can give you access to my dashboard if you would like to look into it. Sorry again for the late reply! I am running a Rift Roleplaying Adventure Community site. I'd love to have the functionality of this plugin on my site! It would give the role players the ability to add more information about their groups.