Which ESO addon does this error belong to?

Paste a Lua error line, a red Dependency name, or a folder you found in Documents\Elder Scrolls Online\live\AddOns\. This names the addon.

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.

The rule, so you can do this without the tool

An ESO Lua error is written like this:

user:/AddOns/LibAddonMenu-2.0/LibAddonMenu-2.0.lua:214: attempt to index a nil value

Read it in three parts:

user:/AddOns/ — a fixed prefix. It always means your Documents\Elder Scrolls Online\live\AddOns\ folder, on every install.
The next segment is the folder name, and the folder name is the only part that identifies an addon. It is not necessarily the name shown in the in-game add-on list: that name comes from the ## Title line of the manifest and authors routinely make the two differ. Several addons also ship more than one folder.
Everything after it — /<File>.lua:<line> — is internal to that addon and useful only to its author. Send it to them verbatim; do not retype it.

Then: 240 of the 3,192 folder names in the ESOUI catalogue are shipped by more than one addon, because addons bundle copies of the libraries they need. When a folder name is ambiguous, the addon that publishes it standalone is the one whose author maintains it — but the copy the game actually loaded may have come from inside a different addon's download.

“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

“Please do not create screenshots and send the screenshot of the error messages! They will be missing information then.”
— https://www.esoui.com/forums/showthread.php?t=8858, read 2026-08-22. documented

Browse instead

Every folder also has its own page: the full folder index (3,192 folders). Walkthroughs: which addon is crashing my UI · the red “Dependency” fix.

FAQ

The error names a library, not the addon I think is broken. Which one do I report?

Frequently the file in the error belongs to a library that several addons share, and the addon that called it is the one at fault. ESOUI's own troubleshooting sticky puts it plainly: "Important: It must not be the causing addon but could be just a library which is missing." Disable everything except the suspect and the libraries it needs, then reproduce.

Why isn't the folder name just the addon's name?

Because the two are independent. The name in the add-on list comes from the ## Title line of the manifest; the folder name is whatever the author called the directory. They often differ, and some addons ship several folders. That is what this lookup is for.

A folder in my AddOns folder isn't in your index. What is it?

Our index is built from the published files of the ESOUI catalogue at our corpus snapshot date. A folder that is not in it is most likely hand-installed, renamed by you, from outside ESOUI, or newer than the snapshot. It is not evidence the folder is malicious — only that we cannot name it.