A corrupted configuration file can point the game to the wrong UI language or asset path.

This usually appears in the main menu or immediately after attempting to search for a match. In many cases, the player appears to be stuck in a "Private Match" lobby state or is unable to load their rank and unlocks.

Technical Support Analysis Team Classification: User Troubleshooting Guide

: Right-click Black Ops 3 in your library > Properties > Installed Files > Verify integrity of game files . This replaces any missing or corrupted UI assets. The "Local Play" Reset :

: Verify the integrity of game files via the Steam Library. 3. Check Steam Workshop Mods