[Solved] Call of Duty WWII “service is not available at this time” 4220 Error on Xbox and PS4

Problem: Call of Duty World War 2 (WWII) prompt error “service is not available at this time” with error code 4220 and unable to connect to online multiplayer mode.

Call of Duty WWII Error code 4220

Content Summary

Solution 1: Power Cycling Console
Solution 2: Login to WWII Nazi Zombies before connect to normal multiplayer
Solution 3: Check Internet connection settings from console
Solution 4: Set the right NAT type
Reference

Solution 1: Power Cycling Console

Completely shut down your console, router, modem and plug out main power supply for around 5 minutes in order to erase any bad configurations and refresh their state.

Solution 2: Login to WWII Nazi Zombies before connect to normal multiplayer

Step 1: Launch Call of Duty WWII on your console, connecting to Xbox Live, then click the option Nazi Zombies.

Step 2: Click on Multiplayer to navigate back to the main menu.

Error Code 4220 from r/WWII

Solution 3: Check Internet connection settings from console

Step 1: Open console settings > Network > Test Internet Connection.

Step 2: Now console will start to check the internet connection details and confirm the connection is established.

Step 3: Now open Call of Duty WWII again and try connecting to Xbox Live.

Solution 4: Set the right NAT type

For Xbox, it is recommended that NAT type set to Open. Go to Settings > All Settings > Network > Test NAT type and make sure it is set to Open.

For PS4 the NAT type should be Type 1. Go to Settings > Network > Connection Status > Set NAT type to Type 1.

Reference

WORLD WAR II SUPPORT: ERROR CODE: 4220!!!!
WORLD WAR II PS4: Error Code 4220
Steam Community: Call of Duty: WWII – Multiplayer: code error 4220