Thank you for the post.
I am able to replicate. From a previous report of this issue Development said: “This is the error that users will see if they cannot reach the update server.”
At this time, FileMaker Pro 14.0.1 is the most up to date version of FileMaker 14.
Additionally, I added your comments to the previous report to see if we cannot provide a more helpful error message in the future.
This issue has been addressed in FileMaker Pro 15.