When using Claude, the most common sticking points are login verification, messages failing to send, quota warnings, and attachment upload failures. Below, these common Claude issues are broken down and explained clearly, with actionable fixes provided based on the symptoms. When you encounter similar prompts, follow this checklist and you can usually get back to normal quickly.
Unable to log in or stuck in repeated verification: first confirm your browser and network
Among common Claude issues, “can’t open the page,” “captcha keeps spinning,” and “after logging in it jumps back to the login page” are mostly related to the browser environment or the network. Try again in an incognito window first, disable ad blockers and script-related extensions, and clear the site cache and cookies. If you’re on a corporate/campus network, try switching to a mobile hotspot to avoid proxies or filtering rules that can cause verification to fail.
Message send failures or blank conversation loading: start with the session and page state
When Claude shows “send failed / request error / conversation not displayed,” first check whether it only affects a specific conversation: testing with a new chat is the fastest. Errors are also more likely after the page has been left idle for a long time—refresh, re-enter the conversation, and send again; it often recovers. If it keeps failing, shorten your input and remove large code blocks or too many links to reduce the complexity of a single request.
Quota insufficient or rate-limited: how to tell it’s a normal limit
Among common Claude issues, “message quota used up” or “please try again later” usually doesn’t mean your account is broken—it means you’ve hit a usage limit or a short-term rate limit. You can pause for a while and try again, or split long tasks into multiple rounds to reduce the output burden per turn. If you frequently upload large files or ask Claude to generate very long content, the limit is more likely to be triggered earlier—this is normal behavior.
Attachment upload failure or incomplete parsing: the file itself matters more than you think
Claude supports various attachments, but when uploads fail, first check whether the file is too large, encrypted, contains corrupted pages, or has excessive scan noise. “Save as”/re-export the PDF, convert images to common formats and compress them, and the success rate will improve noticeably. If Claude only reads part of the content, split the file and upload by chapter, and clearly specify in your prompt: “Answer based only on the attachments in this upload.”
Account anomalies or being blocked: don’t brute-force it—do the minimal self-check first
If you run into Claude login restrictions, suspected risk control, or security warnings, repeatedly refreshing and forcing it is not recommended, as it can worsen the state. First confirm whether you’ve been frequently switching devices, or whether you’re using an unstable network exit; then switch to a stable network and log in with a single browser. If the issue persists, keep screenshots of the error and the approximate timestamps, and report via the official support channels for better efficiency.
