Claude Troubleshooting Guide: Fix a Blank Page, Stuck Sending, Message Failures, and Account Restrictions

If Claude shows a blank screen, won’t load, gets stuck spinning, can’t send messages, or flags your account as restricted, it’s usually not that the model is “broken.” More often, it’s caused by your browser setup, network path, or an account security restriction. Below is a practical, common troubleshooting flow to help you get back to normal chatting as quickly as possible.

Claude blank page / won’t load: start with the browser and cache

If Claude loads to a white screen or gets stuck on the loading animation, first open the same URL in an incognito/private window to confirm whether an extension or cached data is causing it. If it works in incognito, go back to your normal window, clear the site’s cache and cookies, then disable extensions one by one—especially ad blockers, script managers, and privacy/security extensions.

Also check whether you’ve enabled tools like “force HTTPS,” proxy switching, or a custom DNS—these can cause Claude’s static resources to fail to load. A more reliable approach is to use a clean browser profile, or test with a different browser to see if the issue repeats.

Claude messages won’t send / keeps spinning: check the network and request blocking

When Claude fails to send messages, common causes include network instability, restrictions on corporate/campus networks, or the browser blocking requests as tracking. Start by refreshing and trying again. If it still fails, switch networks (for example, from Wi‑Fi to a mobile hotspot) to compare and determine whether your current network gateway is the problem.

If you’re using a proxy or acceleration tool, keep the node stable and avoid frequent switching; rapidly changing egress IPs can look like abnormal traffic to Claude. Another frequent cause is overly strict browser privacy settings—try temporarily turning off “strict tracking prevention,” or add Claude-related domains to your allowlist.

Claude says your account is restricted / verification required: follow the security flow

If you see “account restricted,” “verification required,” or “can’t continue,” stop repeatedly logging in and refreshing to avoid triggering higher-level risk controls. Confirm your email and phone (if applicable) can receive verification messages, check spam/junk folders and block lists, and avoid signing into the same account on too many devices at once.

If you sent a large number of requests in a short time, or frequently changed networks/devices, that can also trigger restrictions. The safest approach is to stick to your usual device and network, complete verification, and then resume normal use. If it still doesn’t recover, contact official support and submit a ticket with your login environment and approximate timeframe to help them investigate.

Claude file upload failed / images not showing: check format, size, and site permissions

If Claude uploads fail, first confirm the file isn’t in use, the filename isn’t too long and doesn’t contain special characters, and use common formats whenever possible. If images don’t display or attachments fail instantly, check whether your browser is blocking site access to the clipboard, file permissions, or pop-ups—any of these can affect Claude’s upload component.

In corporate networks, large files or certain file types may be blocked, making Claude appear to “do nothing.” Testing with a mobile hotspot is the fastest way to confirm: if it works on hotspot, it’s likely a network policy issue and you’ll need a more open network or ask IT to allow it.

The shortest Claude troubleshooting path: a 3-step quick check

Step one: open Claude in an incognito/private window and log in to quickly rule out extensions and cache. Step two: switch networks and run a message-send test to confirm whether something is being blocked. Step three: keep your device and network stable, and avoid frequent switching that could trigger Claude’s risk controls.

If you follow this order, most Claude blank screens, send failures, and account restriction issues can be narrowed down to one of three categories—“browser environment,” “network egress,” or “account verification”—so you can stop guessing and fix it systematically.