Claude Troubleshooting Guide: Blank Page, Login Loop, and Handling Network Restrictions

The most frustrating part of using Claude isn’t not knowing how—it’s when it suddenly won’t open, keeps spinning, or repeatedly asks you to log in. This Claude troubleshooting guide is written in the order of “quick fixes first, then deeper diagnosis,” prioritizing three high-frequency issues: blank pages, login loops, and network restrictions. Follow these steps and you can usually get Claude back to normal within a few minutes.

Start with these three steps: the fastest way to begin troubleshooting Claude

When Claude behaves abnormally, don’t rush to switch devices: Step 1, refresh the page and wait 10–20 seconds to rule out temporary hiccups. Step 2, open Claude in an incognito/private window to quickly check whether cache or extensions are affecting it. Step 3, switch networks (toggle between Wi‑Fi and mobile hotspot), because many Claude troubleshooting cases ultimately come down to the network path.

If Claude opens normally in an incognito window, the problem is most likely browser cache, extensions, or a Cookie conflict; if switching networks fixes it, investigate network policies and DNS first.

Claude shows a blank page or keeps loading: cache, scripts, and browser settings

A blank Claude page is commonly caused by corrupted cache files or blocked scripts. First, in your browser, clear only the cache and Cookies for Claude-related sites (no need to wipe everything), then log in again. Next, temporarily disable ad blockers, privacy/anti-tracking tools, and script-management extensions, then open Claude again to see whether it’s restored.

If your work computer has security software or “enhanced protection” in the browser, it may also block resources Claude needs. During Claude troubleshooting, you can test with a clean browser setup—for example, create a new browser user profile to ensure no extensions interfere.

Claude login loop / repeated verification: Cookie conflicts and leftover multi-account sessions

If Claude keeps redirecting back to the login page, it’s usually because Cookie writing fails or is blocked. Check whether your browser has disabled third-party Cookies or enabled “clear Cookies on exit”—either can prevent Claude from maintaining a session. Add the Claude site to the exception list that allows Cookies to be written, then log in again.

If you frequently switch between Claude accounts in the same browser, old sessions can remain and cause a login loop. Recommended Claude troubleshooting steps: fully log out in Claude first, then clear that site’s Cookies, then log back in using only one account. After it’s stable, consider switching again.

Claude says network restricted or request failed: a diagnostic order from DNS to proxies

When Claude shows “network restricted,” “request failed,” or no response on sending, start with the simplest check: if a phone hotspot works but the company network doesn’t, it’s basically a network policy issue. Claude troubleshooting should first check whether a proxy/traffic-splitting tool is enabled and whether rules are sending Claude traffic to an unavailable route. If necessary, temporarily turn off the proxy and test again.

Next, unstable DNS resolution can cause Claude resources to load incompletely—try switching to a more reliable public DNS and retry. If you’re in a restricted network environment, avoid frequent refreshing and repeated submissions, as that can make Claude more likely to trigger risk controls or verification.

Still not working: collect info so support can locate the Claude issue faster

If you still can’t resolve the problem after completing the above Claude troubleshooting steps, gather the information all at once: the exact page where the issue occurs, whether incognito works, network environment (home/company/campus), browser version, and screenshots of errors. Then try logging into Claude on another device to verify whether it’s a local-machine issue—this step can significantly narrow down the cause.

When submitting feedback, don’t just write “Claude doesn’t work.” Instead describe what actions preceded it, how often it happens, and whether it’s reproducible. The more complete the information, the easier it is to pinpoint and restore Claude.