Claude FAQ: Login Verification, Risk-Control Alerts, and Handling Conversation Saving

This Claude FAQ is specifically aimed at resolving common frustrations such as failed login verification, frequent risk-control alerts, and conversations not being saved. Follow the troubleshooting steps below in order; usually you can get back to normal without reinstalling. For account-security-related issues, it’s more reliable to prioritize the official process.

Can’t log in / verification gets stuck: check your browser and network first

If Claude keeps spinning on login or the CAPTCHA won’t load, the most common cause is browser cache or an extension blocking it. First open Claude in an incognito window, temporarily disable ad blockers and script-manager extensions, then try logging in again. If it still fails, switch to a different network egress or switch to a mobile hotspot to rule out network-side blocking and abnormal DNS resolution.

If Claude repeatedly jumps back to the login page during the email verification step, it’s recommended to clear the site cookies and go through the verification link again. Logging in on multiple devices at the same time can also cause session conflicts—log out of Claude on other devices first and keep only one device to complete verification.

“Unusual activity / risk control” prompt: reduce triggering behavior and check your environment

If Claude shows a risk-control alert, it’s usually related to high-frequency logins in a short period, frequent network switching, or repeatedly switching accounts within the same browser. First, stick to one regularly used device and browser for Claude, and avoid logging in back and forth across multiple devices. Don’t use unknown proxies or shared environments, as they’re more likely to trigger risk controls.

If Claude asks you to verify again or limits actions, wait for a while before trying again and slow down your activity pace. Confirm that your account email can receive messages normally so you can complete Claude’s security verification flow.

Conversations not saved / missing history: confirm the account and sync status

If Claude’s history suddenly appears empty, first confirm whether you switched to a different sign-in method or a different account. Many people use different login entry points for the same email, making Claude look like it “lost sessions.” In addition, disabling third-party cookies or using a strict privacy mode in the browser may affect Claude’s session persistence; try temporarily allowing it and test again.

File upload failures and messages not sending: use “minimal input” to pinpoint the issue

When Claude upload fails, first reduce the file to a more basic format and size—for example, export it as PDF or plain text—then try uploading again. Next, simplify your question into one or two sentences to confirm Claude can send messages normally, so you don’t mistake a “network/session issue” for a “file issue.” If it fails only for a particular file, it’s likely file corruption, encoding anomalies, or content-triggered blocking; re-exporting usually works.

If you still can’t recover after troubleshooting, submit feedback in the Claude Help Center: include an error screenshot, reproduction steps, browser version, and a description of your network environment. The more complete the information, the faster Claude can identify the cause and provide actionable recommendations.