Claude FAQ: What to do about risk-control warnings, message failures, and getting stuck on login

When using Claude, the most frustrating thing is usually not not knowing how to use it, but suddenly getting stuck at login, being unable to send messages, or seeing a risk-control warning. Below, I break down Claude’s common issues by real usage scenarios and provide the highest-priority troubleshooting order. Follow these steps and you can usually get back to normal within a few minutes.

How to handle Claude getting stuck on login or a blank page

First, confirm whether Claude is under maintenance: open the official status page at status.anthropic.com and check whether there are any service incidents. If the status is normal, prioritize clearing your browser cache and cookies, then log in to Claude again in an incognito/private window—many “blank screen/spinning” issues can be resolved directly this way.

If it’s still stuck, disable browser extensions (especially ad blockers, script managers, and privacy-related plugins) and then refresh the Claude page. A corporate network or public Wi‑Fi may also block resources; switching networks or using a mobile hotspot often works immediately.

Claude message send failure, constantly showing an error and retrying

The most common causes of Claude send failures are network jitter or requests being blocked. First, copy what you typed as a backup, then shorten each submission: split long content into two or three parts and send them separately to avoid failures caused by an oversized single request.

If you pasted a large amount of code, tables, or special symbols into Claude, it’s recommended to remove extra spaces and repeated line breaks, then resend. If it still doesn’t work, switching browser engines (e.g., from one browser to Chrome/Edge) is usually more effective than repeatedly clicking “Retry.”

Claude shows a risk-control warning, suspected account restriction

When Claude triggers risk control, first stop high-frequency actions: don’t refresh repeatedly in quick succession, and don’t resend identical content multiple times within a short period. Next, check whether you switched among multiple network environments in a short time (e.g., VPNs, proxies, cross-region nodes), since these kinds of changes can easily trigger Claude’s security policies.

The approach is “stabilize the environment, then log in again”: stick to a fixed network and fixed browser, wait for a while, and then try again. If the warning persists, submit a ticket directly in the Claude Help Center, describing your account email, the page where the warning appears, and the approximate time—this is usually faster than repeatedly trying on your own.

Troubleshooting order for Claude file upload failures or features turning gray

When Claude uploads fail, first check the file itself: is it too large, is it encrypted, and is the format common (such as PDF, images, or text). Renaming the file using English letters or numbers and avoiding overly deep file paths can also reduce the chance that Claude fails to read it.

If the button in Claude turns gray directly, it’s most likely that page resources didn’t load completely or the session is abnormal. Refresh the page or start a new chat and try uploading again; if it still doesn’t work, switch networks and disable extension plugins—this usually restores Claude’s upload feature to a usable state.