If the game cannot establish an online connection, please ensure that your firewall does not block outgoing TCP connections from FCPrimal.exe, UbisoftGameLauncher64.exe and UplayService.exe. This means you will need to white list this software in your firewall.
We have identified that this error is more frequent for Bitdefender's users, so here are the steps you will have to apply:
1. Turn off Bitdefender.
2. Open the Bitdefender program and go to the Modules window by clicking
3. Here, under the Protection tab select Antivirus.
4. In the Antivirus window select the Exclusions tab.
5. Make sure Exclusions for files is turned on by clicking the switch.
6. Click the Excluded files and folders link.
7. Click the Add button, located at the top of the exclusions table.
8. Click Browse, select the folder that you want to be excluded from scanning. Make sure it's excluded for both "on-access and "on-demand" scanning and then click OK.
9. Click Add and then click OK to save the changes and close the window.
10. Then click on "Excluded processes", add the .exe file of the application and make sure it is "Allowed" > click "Add" and then on Close. (this will exclude them from being monitored by the ATC and IDS)
To add a Firewall rule for an application (this applies to Bitdefender Internet Security and Bitdefender Total Security):
1. Go to the Protection section and then click on the Firewall module.
2. Click on the Rules tab at the top and then select Add rule.
3. Browse to the application and click Ok, and then make sure the following settings are enabled:
Click on OK and close the Rules window.
When you start your game, please Run the game as administrator.
You can do this by clicking on the Uplay icon on your system with the right mouse button and select "Run as Admin".
If these steps do not solve the issue please try to the following:-
2. Once you have done this, launch the game.
3. When the game has started and you reach the main menu, shut down the game.
4. After this operation, please reinstall Bitdefender and try the game again.