There is an issue with multiplayer mode in Code Vein. For example, a player in North America can't summon the another player in Europe. If you are experiencing this problem follow the fix below.
How to Resolve Issue with Multiplayer on Code Vein?
- Launch the Steam
- At the top left, click on the Steam
- Then click on the Settings.
- Go to the Downloads tab.
- Change the Download Region. Select the same region with your friend.
- Finally, click on the OK button.
That's all, enjoy!
By the way, you can buy the Code Vein for really cheap.