How to Fix Gmail Error #007: "Oops, the System Encountered a Problem"

By FixMyError · Updated October 13, 2026 · 8 min read

What Gmail error #007 means

When Gmail shows "Oops... the system encountered a problem (#007)", it is not telling you exactly what went wrong — it is a generic catch-all that Google's webmail throws when its JavaScript app crashes, freezes, or cannot finish the action you asked for. In practice the page locks up: clicking buttons does nothing, the send spinner keeps spinning, or a message refuses to open. It most often appears while sending mail (especially with attachments), but it can also strike when opening, moving, or deleting messages.

The good news is that #007 is almost never a problem with your account or your emails. Your mailbox, labels, and contacts are untouched on Google's servers; the failure is happening inside your browser — a corrupted cache entry, a stale login cookie, an extension meddling with Gmail's code, or an antivirus web shield mangling the page. That is why the fixes all live on your device rather than in your Gmail settings.

Common causes

• Corrupted browser cache or cookies: damaged stored data for mail.google.com breaks Gmail's session and triggers the error on load or send.
• Conflicting browser extensions: ad blockers, privacy tools, grammar checkers, and email trackers can interfere with Gmail's scripts.
• Large or problematic attachments: heavy files can time out during upload, and Gmail surfaces the generic #007 instead of a size warning.
• Outdated browser: an old Chrome, Edge, or Firefox build can clash with Gmail's latest web code.
• Antivirus or security software: real-time web shields that scan traffic can corrupt Gmail's session data, causing repeated #007 errors.

How to fix Gmail error #007 — step by step

Work through these fixes in order. Most #007 cases are fixed by step 1 or 2.

1. Hard-refresh Gmail and retry the action. Before changing anything, rule out a one-time hiccup. Press Ctrl+Shift+R on Windows or Cmd+Shift+R on Mac to reload Gmail with a fresh request instead of the cached version. Then repeat exactly what triggered the error — send the email again, open the message, or delete the thread. If #007 does not reappear, it was a momentary glitch and nothing else needs fixing.
2. Clear your browser's cache and cookies. Corrupted cached data for Gmail is the most common trigger of error #007. In Chrome, type chrome://settings/clearBrowserData in the address bar, set the time range to All time, check Cookies and other site data and Cached images and files, then click Clear data. In Edge, go to Settings, then Privacy, search, and services, then Clear browsing data, and choose All time. In Firefox, open Settings, then Privacy & Security, then Clear Data. Close the browser completely, reopen it, and sign back into Gmail.
3. Test Gmail in an incognito or private window. Open a private browsing window — Ctrl+Shift+N in Chrome and Edge, or Ctrl+Shift+P in Firefox — and sign in to mail.google.com there. Private windows run without extensions and with a clean session, so if #007 is gone in private mode, the problem is an extension, cookie, or setting in your normal profile, not Gmail itself. Use this diagnosis to decide whether the next steps are necessary.
4. Disable browser extensions that touch Gmail. Ad blockers, privacy tools, grammar checkers, and email-tracking extensions can interfere with Gmail's code and trigger #007. In Chrome, go to chrome://extensions and turn off every extension, then test Gmail. If the error is gone, re-enable extensions one at a time until the error returns — that one is the culprit. Keep it disabled or add an exception for mail.google.com in the extension's settings.
5. Shrink the email — remove or compress attachments. Error #007 often appears while sending large emails. Gmail rejects attachments larger than 25 MB, and even smaller heavy attachments can time out. Try sending the message without the attachment first. If it goes through, compress the file into a ZIP, upload it to Google Drive, and send a Drive link instead. For photos, reduce their resolution or convert them to a smaller format before attaching.
6. Update your browser or try a different one. An outdated browser can misbehave with Gmail's latest code. In Chrome, go to Settings, then About Chrome, and install any pending update; do the same under Edge's Settings, then About Microsoft Edge, or Firefox's Help, then About Firefox. If #007 persists after updating, open Gmail in a completely different browser (Chrome, Edge, or Firefox) to see whether the error follows your account or is specific to the first browser.
7. Pause antivirus mail scanning and check Google's status. Some antivirus programs scan web traffic in real time and corrupt Gmail's session, which surfaces as error #007. Open your antivirus settings, temporarily turn off the email or web shield, and try Gmail again — if the error stops, add an exception for mail.google.com instead of leaving protection off. Finally, rule out a Google-side outage: if #007 appears on every device and browser, check the Google Workspace Status Dashboard. A green board with a continuing error means waiting for Google is the only fix.

Did this fix it? Quick checklist

• Gmail loads and stays responsive for several minutes
• Emails send normally, including ones with attachments
• No "Oops, the system encountered a problem" banner reappears
• The error is gone after a full browser restart

If #007 only appears on one network, a strict office or school firewall may be mangling Gmail's traffic — try your phone's mobile data to confirm. Users on older operating systems that can no longer run a current browser may hit this error more often, because Gmail's web app expects a modern engine; upgrading the browser (or switching to the Gmail mobile app) is the durable fix. And if the error shows up the moment you open Gmail even after all seven steps, a third-party tool may be rewriting your browser profile — check for unfamiliar extensions or "managed by your organization" flags in your browser settings.