Hi Alex,
Thank you for your help. Unfortunately I have not found the error and sorry for the late reply.
I would like once again to thank you for the great help. As soon I have more time, I will again seek a solution. It would be possible that it is up to the account settings of the user.
In the meantime, I have performed an update to the new version of JFBConnect. Unfortunately, this error is but very persistent.
As soon I find a solution or the cause know I will notify you.
Many thanks and best regards from Berlin
It a great extension and a great job.
We can close the request!