ESODecoded

Which addon is BossBoxTimer?

An in-game error, a load-order warning or a red Dependency line that mentions user:/AddOns/BossBoxTimer/ — or a folder sitting in your Documents\Elder Scrolls Online\live\AddOns\ that you do not recognise — belongs to what is listed below.

Anchors for every claim on this page: the live game runs API 101050 (Update 50, live 2026-06-08). Update 51 is on the public test server now and is scheduled to go live on PC/Mac on September 28, 2026. Feed retrieved 2026-08-22 · corpus snapshot 2026-08-22.

Exactly one addon in the ESOUI catalogue ships a folder called BossBoxTimer: BossBoxTimer. An error naming that folder is that addon's.

AddonRelationship to this folder Downloads, lifetimeStatus
BossBoxTimerships it as its own addon375not updated since the patch

How to read the error line

An ESO Lua error is written as user:/AddOns/<Folder>/<File>.lua:<line>. Only the <Folder> segment identifies the addon — the file name and the line number are internal to it, and the addon's display name in the add-on list is frequently different from its folder name. That is the whole reason this page exists.

“Important: It must not be the causing addon but could be just a library which is missing.” — source, read 2026-08-22

“Attention: If the numberis missing you need to enable them at the ingame addon manager (press ESC to get to the menu -> AddOns) and enable the checkbox "Advanced UI errors".” — source, read 2026-08-22

Paste a whole error into the error-line resolver, or read the walkthrough: which ESO addon is crashing my UI.