Many users found that resetting their Zombies level to 0 or standard Master Prestige fixed the UI freezing issues.
Background software (RGB controllers, recording software, MSI Afterburner) can hook into blackops3.exe and corrupt UI calls.
If your error pops up specifically when clicking into Weapon Customization, a corrupt variant is stuck in your inventory data. Because the UI error crashes the menu before you can hit delete, you must bypass the normal structure using the blueprint lobby glitch to clear it out.
Enter a "blueprint lobby" through a glitch or specific mod menu. Equip the weapon causing the error in a secondary slot. ui error 27393 black ops 3
Back up the file to a USB drive or cloud storage just in case, then delete the local file.
Start the game and stay on the very first screen.
Creating too many weapon mods or saving a "fake" blueprint often causes the UI to crash. Many users found that resetting their Zombies level
Wait for Steam to scan your installation and automatically re-download any corrupted pieces. 5. Fresh Profile Synchronization
If the error acts as an endless loop as soon as you connect to the online services, you need to force the game to re-download your profile data.
Return to the main menu and try accessing the weapon normally. 2. Disconnect Second Monitor (Best for PC Crashes) Because the UI error crashes the menu before
Delete any custom paintjobs you have created, especially those applied to Black Market weapons.
Right-click on and select Properties . Go to the Installed Files tab. Click Verify integrity of game files .
For general UI stability, ensure your game environment is optimized:
Hover over your classes and look for any visual glitches (like missing weapon models or blank text).