Greetings Adventurer!

We would be happy to assist with your concern. Please try the following troubleshooting to see if this helps with the connection issues you are experiencing. Although it seems that you have already tried port forwarding, we would still ask of you to check to see if the following port ranges are opened on your router. You can contact your ISP and request they open them for you
▼TCP
54992 through 54994,
55006 through 55007,
55021 through 55040

We would also suggest to power cycle the console and router by shutting down the PlayStation 4/Router and leaving the power supply unplugged for 5-10 minutes. We would also recommend that you use a wired connection if you are currently using wireless.

Additionally, the issue you are describing is can be associated with interference with the game data. Most of the time, it results from certain security/privacy changes on PSN web browser. Please make sure that "Cookies" and "JavaScript" are ENABLED on the PSN Browser. This can be done by going to the web browser on the PS4, press the options button, then go to settings. The options for Cookies and Javascript will most likely be checked, uncheck them and then recheck them.

If you do not see an improvement, please feel free to respond to this thread for further troubleshooting.

Thank you for visiting the FINAL FANTASY XIV Technical Support Forums!