Claude Troubleshooting Guide: Common Error Messages and Fixes for Stuck Sending

If Claude won’t open, messages won’t send, it keeps spinning, or attachment uploads fail, in most cases it’s not that “the account is broken,” but rather that network issues, browser cache, or the input content has triggered a restriction. Below is a Claude troubleshooting checklist for the most common scenarios; following it in order usually helps you pinpoint the problem quickly.

First, determine whether it’s caused by the server side or the network

The first step in troubleshooting Claude is to switch to a different network or try again using a mobile hotspot. Many “failed to load” issues are actually due to unstable network quality. If you’re on a company/campus network, you may be blocked by a proxy, gateway, or security policy; temporarily disabling the relevant blocking rules or switching networks is recommended.

If the same issue occurs on different devices, check the official status page or announcements first to see whether there’s a service disruption. When the server is having issues, repeatedly refreshing only makes the queue worse; waiting a while before trying again is often more effective.

What to do if you can’t send, it keeps spinning, or the page is blank

The most commonly used method in Claude troubleshooting is to “log in once in an incognito window,” to rule out extension add-ons and cache conflicts. Then clear site data (cookies/cache) and log in again—common “Something went wrong” errors will drop noticeably.

If you use extensions such as translation tools, script managers, or ad blockers, it’s recommended to disable them all first, then re-enable them one by one to identify the culprit. If the page is blank or buttons don’t respond, you can also try switching browser engines (for example, from Chrome to Edge) to see whether it’s a rendering issue or an extension compatibility problem.

Troubleshooting order for attachment upload failures and unavailable images/files

When troubleshooting Claude and you run into upload failures, first check whether the file is too large, whether the format is supported, and whether the filename contains special characters. Converting the file to a more common format, compressing it, and renaming it using a combination of English letters and numbers will improve the success rate.

Next, confirm whether your network is dropping during the upload stage: if the progress bar gets stuck, switching networks is more effective than repeatedly clicking “Retry.” If it still doesn’t work, split the content into multiple smaller files, or send a text summary first and upload the attachments afterward to avoid an overly heavy single request.

Rate limits, overly long context, and “response interrupted”

If you see “too many requests” or the conversation suddenly gets interrupted, it’s usually due to submitting repeatedly within a short period or having an overly long single input. Claude troubleshooting recommends lowering your sending frequency, splitting an extra-long request into 2–3 messages, and reducing unnecessary references to earlier conversation history.

If a particular passage triggers an error every time you send it, it may have tripped a safety policy or contain abnormal characters. Try rewriting it in more neutral wording first, then gradually add details to confirm which sentence is causing the failure.

Still not resolved: prepare reproducible information before asking for help

At this stage of troubleshooting Claude, the key is to “state the details clearly”: the exact error message text, the steps that lead to it, your network environment, browser version, and whether it can be reproduced in an incognito window. Also include the approximate input length and whether attachments were included, so customer service or technical support can locate the issue quickly.

It’s also recommended to keep a comparison between one successful attempt and one failed attempt (same network/different network, same browser/incognito mode). This saves more time than repeated trial-and-error and makes it easier to find the true trigger.