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HomeTips & TricksClaudeClaude Error Troubleshooting Guide: Fix Chat Interruptions & Response Failures

Claude Error Troubleshooting Guide: Fix Chat Interruptions & Response Failures

6/2/2026
Claude

When using Claude for conversations, you may occasionally encounter interruptions, failed responses, or unusual prompts. This article covers the most common error scenarios and provides straightforward, effective solutions to help you get back to smooth usage quickly.

Conversation Too Long Warning: "This conversation is too long"

Claude has a context limit per session. When your chat history exceeds the token threshold, the system rejects new messages and shows this warning. The fix is simple: start a new conversation. Click "New Chat" in the Claude interface, then manually copy key information from your previous session into the new one. Alternatively, trim and simplify your history by removing duplicate or irrelevant messages to avoid hitting the limit again.

If this happens frequently, your conversations are likely exceeding the model's optimal processing range. Try to keep each exchange concise, or use Claude's "Project" feature to break long-term tasks into multiple sessions.

Content Flagged: "Your message was flagged"

Due to safety policies, Claude scans for sensitive words or inappropriate content and may refuse to respond, showing this message. First, check if your input contains political, violent, explicit, or private information. If so, rephrase it. If you didn't intentionally violate any rules, it could be a false positive—try splitting your original message into shorter, more neutral statements and resend them.

Another possibility: sending too many similar requests from the same account in a short period can trigger a bot detection. In that case, pause for a few minutes, switch your IP, or try the web interface to resolve the issue.

Authentication Error: "Authentication error"

If you see this error when logging into Claude, it's usually related to your account credentials or network environment. First, verify that your subscription is active (for Pro users) and that your email and password are correct. Clear your browser cache and cookies, or try logging in through incognito mode. If using the API, confirm that your API key hasn't expired or been revoked, and check that the Authorization header in your request is formatted as "Bearer sk-xxx".

Enterprise users who fail to log in via SSO should contact their admin to reissue permissions.

Response Generation Interruption & Timeout

If Claude suddenly stops responding mid-conversation or takes too long, it's often due to network fluctuations or server load. First, check your local network stability, disable your proxy, or switch nodes. If the problem persists, refresh the page or try a different browser (Chrome or Edge latest version recommended). For API calls, implement a retry mechanism in your code (3 attempts with 2-second intervals) and set a reasonable timeout (30 seconds or more).

Occasionally, Claude may experience maintenance or peak-hour delays. Visit status.anthropic.com to check service status and wait patiently for recovery.

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