Hi bdbcat
thanks for your quick reply
Indeed it's strange :
no problem with my Firewall
no VPN used
no problem with my ISP
I use Firefox and allowed the cookies from
OpenCPN and jotform
I'm registered on OpenCPN site and used my name and mail address to send this message
Nevertheless the most important is that you got this information for users willing to use OpenCPN and its plugins without needing to get it working inside Flatpak
(Mageia continues to provide them as rpms after having a little patched the sources so that it's still possible)