Hi Ignacio,
I received a reply below from Guido at Adobe:
Hi brihi, could you please try to re-sign-in to Lr Mobile on the iPad/iPhone. There was a misconfiguration at the back-end of your account. This should be fixed now.
Reason for the failure was a second needless lightroom catalog generated by the Lr Mobile app. Occurs sometimes after a triggered "Delete Data" by Lightroom desktop. We will fix this with our next planned Lr Mobile update.
Let me know if its working now on your side..."
So now it works!
Thank-you very much for you support!
Regards,
-BrianP