What’s most frustrating about using Claude isn’t a bad answer, but sudden errors, endless spinning, or attachments that won’t upload. Below, organized by the most common issues, is a clear troubleshooting order for the Claude web app: first confirm your environment, then address 429, 500, and upload failures accordingly.
Start with two “basic checkups”—many errors disappear immediately
When you hit a Claude error, first open an incognito window and log in again, then disable browser extensions such as ad blockers and script managers. Next, clear the site’s cache and cookies once—especially if you’re seeing repeated refreshes or being sent back to the login page. This step is often the most effective.
If you’re using Claude on a corporate or campus network, try switching to your phone’s hotspot for a test. Network-layer proxies, DNS hijacking, or blocked WebSockets can make Claude behave like “loading” / “send failed,” without the page necessarily indicating the cause.
Claude shows 429 rate limiting: it’s not broken—your requests are too frequent
A 429 (Too Many Requests) error in Claude usually means you sent too many messages in a short time, or a single input was so long that it triggered frequent retries. The fix is simple: wait one or two minutes and send again; avoid clicking “Regenerate” rapidly in succession, and don’t run the same task in multiple windows at once.
Content-wise, split a large question into 2–3 messages to avoid pasting an extremely long chunk all at once. If multiple people share the same outbound IP on the same network, Claude is more likely to trigger rate limits—switching networks often recovers faster than repeatedly refreshing.
