Troubleshooting Guide for Claude Web: Load Failures, White Screen, and Login Loops

If Claude suddenly turns into a white screen, keeps spinning/loading, or kicks you back to the login page right after you sign in, it’s usually not that your “account is gone,” but that something is wrong with your browser cache, extensions, network blocking, or session state. Below is a prioritized troubleshooting sequence for Claude to restore the page with as few steps as possible.

First, confirm whether it’s a server-side issue or network blocking

When Claude fails to load, first switch to a different network environment for comparison: on the same device, try using a mobile hotspot once—this quickly tells you whether it’s local network blocking. If a corporate/campus network has a proxy, firewall, or DNS hijacking, Claude may get stuck on a verification page or go blank directly.

Also check whether the page shows a security verification or blocking message (such as 403-type access restrictions). If it’s only a temporary fluctuation, waiting a bit and refreshing is more effective than repeatedly logging in, to avoid triggering risk controls.

Handle cache and cookies: the most common cause of login loops

Most Claude login loops are related to inconsistent cookie state: you appear to have logged in successfully, but the session isn’t written or is overwritten by old cache. First try logging into Claude in an incognito/private window; if it works there, it basically confirms a cache/cookie issue.

For a proper fix, clear Claude-related site data (cache and cookies), then restart the browser and log in again. Also check whether the browser is blocking third-party cookies or has stricter “tracking protection” enabled—this can cause Claude sessions to repeatedly become invalid.

Check extensions and script conflicts: the culprit behind white screens/unresponsive buttons

Ad blockers, privacy-protection tools, and script-management extensions can easily block required Claude resources as tracking scripts, resulting in a white screen, buttons not responding, or the chat area not loading. The easiest approach is to temporarily disable these extensions, then refresh the Claude page.

If you want to keep the extensions, you can also whitelist Claude’s domain. In particular, advanced rules like “block third-party requests” and “prevent fingerprinting” should be turned off first, then re-enabled one by one to identify which rule is causing Claude to malfunction.

Account and session self-check: watch out for multiple devices and frequent switching

If the same account logs in frequently across multiple devices or repeatedly logs out/switches in a short period, Claude may experience session desynchronization, showing up as being logged out right after logging in. You can fully log out of Claude on other devices first, then return to the current device and log in again to reduce interference from concurrent sessions.

Also confirm whether the system time is set to sync automatically. Time drift affects security token validation, causing Claude to become invalid immediately after a successful login, which looks like an “infinite redirect.”

Still not resolved: prepare these three pieces of info for support/tickets

If Claude still fails to load, prepare: the exact on-page behavior (white screen/spinning/login loop), the browser version and whether extensions are installed, and the steps to reproduce. If you can, include screenshots—ideally also one of the browser console error (capture only the key information).

This information helps troubleshooting shift from “guessing causes” to “targeted fixes.” Before submitting, verify once more in an incognito/private window—often this directly confirms whether clearing cache and adjusting extensions has already resolved the issue.