Invalid Response from Server; Persistent Problem Since October 2016.

My last successful sync was on the 1st of October 2016. Since that time, I have consistently received an 'Invalid Response from Server' Error.

I thought it was something on the server side and did not think much of it at the time, but after 100 days of not being able to sync (which I pay for) it is becoming a sore tooth... Any assistance would be GREATLY appreciated :) Below is a copy of the error report ID# 1318817976 (error text below).

Sync automatically on/off both produces the error.

[JavaScript Error: "Translator with ID 32d59d2d-b65a-4da4-b0a3-bdd3cfb979e7 already loaded from "RIS.js"" {file: "file:///E:/AppData/Zotero/translators/__RIS.js" line: 0}]
[JavaScript Error: "1484789880744 Toolkit.Telemetry ERROR TelemetryStorage::loadAbortedSessionPing - error removing ping: PingReadError JS Stack trace: PingReadError@TelemetryStorage.jsm:80:15 < TelemetryStorageImpl.loadPingFile<@TelemetryStorage.jsm:1440:13" {file: "resource://gre/modules/Log.jsm" line: 749}]
[JavaScript Error: "Invalid response from server (Report ID: 95fd977f5b)" {file: "chrome://zotero/content/xpcom/sync.js" line: 2595}]
[JavaScript Error: "Error: Invalid response from server (Report ID: 95fd977f5b)" {file: "chrome://zotero/content/xpcom/sync.js" line: 652}]
[JavaScript Error: "Invalid response from server (Report ID: 643a3fa3ff)" {file: "chrome://zotero/content/xpcom/sync.js" line: 2595}]
[JavaScript Error: "Error: Invalid response from server (Report ID: 643a3fa3ff)" {file: "chrome://zotero/content/xpcom/sync.js" line: 652}]

version =>, platform => Win32, oscpu => Windows NT 10.0; WOW64, locale => en-US, appName => Zotero, appVersion =>, extensions => Zotero LibreOffice Integration (3.5.12.SA., extension), Zotero Word for Windows Integration (3.5.5.SA., extension), Google Update (, plugin), NVIDIA 3D VISION (, plugin), NVIDIA 3D Vision (, plugin), Microsoft Office 2016 (16.0.7571.7095, plugin), Silverlight Plug-In (5.1.50901.0, plugin), Java(TM) Platform SE 8 U111 (, plugin), Java Deployment Toolkit 8.0.1110.14 (, plugin), Foxit PhantomPDF Plugin for Mozilla (, plugin)
  • Sorry about that — how about now?
  • (For what it's worth, the upcoming Zotero 5.0 should handle large libraries like yours much better.)
  • Thanks :) Its working now... I tried the Zotero 5.0 beta before posting, but it was getting hung-up on 'updating database' (or something like that) upon opening after installation, so I went back to the stable release version.
  • Zotero 5.0 is going to be released very soon, so if you were having trouble upgrading, that'd be something we'd want to fix — otherwise you're just going to see the same thing as soon as 5.0 comes out.
  • edited January 19, 2017
    Oh, actually, scratch that — I forgot that there's a known issue upgrading databases with a large number of attachments to 5.0, so that's probably what you were seeing. So no point debugging this further until a fix for that is in place.
  • Okay, good to know. If you need me to test it out once a fix is in place let me know.
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