When using Claude, what most often blocks people isn’t the prompt, but “can’t send,” “can’t get in,” and “can’t verify.” This FAQ breaks down the most common issues and explains them clearly: from verification codes and regional restrictions to message send failures—troubleshoot step by step and avoid unnecessary detours as much as possible.
Claude can’t send messages: loading spinner, no response, and request failures
If Claude keeps spinning or fails to send, do the two most basic things first: refresh the page and log in again, then switch to a different network environment (for example, from a company network to a mobile hotspot). Many issues come from browser extension conflicts—especially ad blockers, script managers, and privacy-enhancing add-ons—so it’s recommended to temporarily disable them and try again.
If the same account doesn’t work on different devices, check Anthropic’s service status page first to see whether there’s an outage or fluctuation; when the service is congested, repeatedly forcing submissions will only make it slower. Wait a few minutes and send again, or split long content into two messages—Claude is more likely to process it stably.
Not receiving Claude verification codes: how to handle email and security blocking
If you don’t receive a verification code during Claude sign-up or login, first check your spam folder and “Promotions/Subscriptions” categories, and search your mailbox for keywords (such as “Claude” or “Anthropic”). Corporate and school email accounts are more likely to be blocked by policy; if possible, switching to a commonly used personal email will be easier.
Clicking “Resend” multiple times in a short period may trigger rate limits, so try again after waiting a few minutes. If you still don’t receive a code, switch browsers or use an incognito/private window to log in to Claude to avoid cache or cookie state affecting the verification flow.
