Code 103 in Apex Legends is an error code that prevents players from logging into the game under certain circumstances. This error code, which tells players they are “unable to complete EA account sign in” isn’t always fixable. Here’s what to do when a fix is possible.
— Naivedhya (@Naivedhya2) June 3, 2020
Apex Legends Code 103 is an error code related to network connectivity problems. It appears to most frequently affect players on the PlayStation 4, though it’s possible players will experience it on other platforms.
To fix the error, first check to make sure your internet connection to your platform of choice is working as intended. If it is, check Electronic Arts’ server status monitor to see if the servers are down — this error typically corresponds with server outages.
If your connection is working and the servers are online, try rebooting your console or PC.
If that still doesn’t solve your problem, try sending a (polite) note to EA’s help desk and awaiting their response.