The most infuriating thing about using Claude isn’t poor answers—it’s when it suddenly won’t open, won’t send, or says you’re restricted. Below, following the order of “first confirm external causes → then handle the local environment → finally check the account and quota,” I’ll break down common issues and explain them clearly. If you follow these steps, you can usually pinpoint the problem within a few minutes.
Start with two quick checks: is Claude down or is it a local issue?
When Claude acts up, first try switching to a different network environment once: on the same device, switch between Wi‑Fi and a mobile hotspot to quickly tell whether it’s local network blocking or instability. Then open Claude in an incognito/private window—if it works in incognito but not in a normal window, the issue is usually a conflict caused by cache, cookies, or extension plugins.
If it doesn’t work across multiple devices and multiple networks, stop repeatedly refreshing—this can easily trigger stricter limits. At this point, it’s better to wait a bit and try again, while keeping the original error message text; it will make later troubleshooting much faster.
What to do (in order) when Claude pages won’t open, keep spinning, or show a blank page
If Claude keeps loading/spinning or shows a blank page, prioritize clearing site data: delete only Claude-related cookies and cache, then log in again. Next, temporarily disable browser extensions—especially ad blockers, script managers, privacy/anti-tracking tools, and proxy-switching extensions, which are most likely to block critical requests.
If you’re on a corporate or campus network, HTTPS inspection or firewall policies may cause Claude resources to load incompletely. Try changing DNS, switching to a more stable network, or, on the same network, testing a different browser engine (e.g., switching between Chrome and Safari) to verify.
