Rather than burn directly to a disc, are you able to create a BluRay Image (ISO) file on your hard drive?
thanks for your suggestion. This morning, I made another attempt at burning the same project and it succeeds. The difference between the 2 previous attempts and the last one is the fact that I have kept the network connection on. Norton was disabled and there was no pending update for Win 10. I do not plan to close this problem now because the project has been burned to a rewritable Blu-ray. I have to verify the result before burning the project to a non-rewritable Blu-ray.
Another point for consideration is whether the last attempt was due to luck or not.
Knowing that the failure of the 2 previous attempts happened at the very same point, I suspect now that Adobe PE 14 requires network connection when compiling the disk menu, which is probably the last step performed before burning to the disk. This is my best guess at this point in time.
I will keep you informed.
as promised, here is the follow-up on this case.
Last night, I made 2 attempts at validating my hypothesis: keeping the network connection active while burning a Blu-ray disk. I did not experience any problem. I have been able to burn 3 Blu-ray with success. I guess that the new approach with PE 14 (compared to my old version of PE 9) about disk menus requires to maintain a web connection even though the selected disk menu is already on your drive.
Based on the results, I think I can consider this case as being closed.