[JavaScript Error: "Discarding invalid field 'publisher' for type 4 for item 5/null"] Report ID: 1047154142

It is indeed plain javascript. You don't need to understand javascript; the BBT page mentions "but usually you can just open a new issue and ask me to write it, and I’ll add it here".

I could do option 2, but option 3 seems far preferable. It looks very basic, just the documentation doesn't say enough if you don't know javascript. By the look of it though, it just a few easy things

Documentation is a bit sparse because it's really just standard javascript. If you know javascript, this should be pretty clear, e.g.

[JavaScript Error: "Cannot call method "tryLock" of null.

The error message is [JavaScript Error: "API key not set"

[JavaScript Error: "File is not valid XML" {file: "chrome://zotero/content/xpcom/style.js" line: 635}]

[JavaScript Error: "uncaught exception: 2147500034" {file: "chrome://zotero/content/xpcom/integration.js" line: 197}]

[JavaScript Error: "idx is not defined" {file: "chrome://zotero/content/xpcom/integration.js" line: 2466}]"

[JavaScript Error: "Discarding invalid field 'patentNumber' for type 4 for item 1/null"]

[JavaScript Error: "An error occurred" {file: "chrome://zotero/content/xpcom/sync/syncEngine.js" line: 1314}]

[JavaScript Error: "Cannot call method "tryLock" of null.

[JavaScript Error: "responseJSON.response.result is undefined

[JavaScript Error: "The connection was refused when attempting to contact wss://stream.zotero.org/."]

[JavaScript Error: "responseJSON.response.result is undefined"]

[JavaScript Error: "HTTP POST https://api.zotero.org/users/1966700/fulltext failed with status code 400"]

[JavaScript Error: "The connection to wss://stream.zotero.org/ has terminated unexpectedly. Some data may have been transferred." {file: "chrome://zotero/content/xpcom/streamer.js" line: 155}]

JavaScript warning: resource://gre/modules/commonjs/toolkit/loader.js -> resource://zotero/bluebird/util.js, line 201: unreachable code after return statement

[JavaScript Error: "Fjernprocedurekaldet mislykkedes.

If you're still on Zotero 4 you'd want to upgrade as a first step, but snapshots of JavaScript-heavy web applications like Facebook ultimately just aren't going to be very reliable, and we're planning