There was some changes made to this with GP 2018 R2, but based on how the environment is setup, customers still cannot create the Safepay file in web client, would like this functionality. This does work if you are logged into web client from the remote desktop, but it does not seem to generate the file with web client on a local machine. You can set the safepay path in the rich / desktop client. Then when you go to generate the file in web client, you get a message the file can be found at (this location) but when you go to that path there is no safepay file exists in that location.