Hello, It's painful because I still have an error in GJ version 2.5.1
An owner or a user of a group see this error on the page group.
But no error if he looks at the page of a group he does not owner or user.
For exemple:
He is user in this group, there is an error
thank you,
I followed your advice and I replaced the line, but the site was blocked.
Then I reinstalled the original package plugin 2.5.1 and now it works and there are no error .... mystery ... it works!