Many Claude users run into login issues, sudden chat interruptions, or "server busy" prompts. This article covers several common problems, from account lockouts to request errors, so you can quickly identify causes and find solutions without the hassle.
Account Locked or Login Failed – What to Do
If you keep entering the correct password but see "account locked," don't rush to reset it. This usually happens after too many wrong attempts in a short time or switching devices frequently, which triggers a security safeguard. Wait 15 to 30 minutes without any action, then try again. If that doesn't work, use the official "forgot password" process to reset—it often unlocks the account automatically. Avoid public Wi-Fi or proxy tools, as those network environments can easily trigger risk control flags.
Another scenario: your account was temporarily frozen after long inactivity, and you see a "verification required" prompt at login. Simply use your registered email to receive the verification code and complete the captcha. Once verified, your account returns to normal. For regular use, try sticking to one device to minimize cross-location login records.
Chat Requests Showing "Error" or "Internal Failure"
These errors are usually not your fault—they're often due to high server load or temporary maintenance on Claude's end. Wait a few minutes and refresh the page. If it persists, clear your browser cache and cookies, or switch browsers (e.g., from Chrome to Edge). Mobile users can try toggling between Wi-Fi and mobile data; some ISPs occasionally block API requests for AI services.
Another possibility is that your message is too long or contains special characters (like large code blocks or emojis). Claude has a per-input limit (about 40,000 characters for the free plan). Exceeding that triggers an error. Break your content into smaller chunks and send them separately. If the problem repeats, check if you're using an outdated browser version—updating to the latest usually resolves it.


