When using ChatGPT, what most often hurts the experience isn’t “not knowing how to ask,” but files that won’t upload, messages that won’t send, or suddenly getting restricted. Below, I break down the most frequent issues by scenario and lay out a step-by-step fix order you can follow directly. You can check them section by section; in most cases, things return to normal within a few minutes.
File upload failure: unsupported format, file too large, and permission blocking
The most common reasons ChatGPT uploads fail are an unsupported file format, an oversized file, or the network being interrupted during upload. First, convert the file to a more widely supported format (such as common document/image formats), and try again after compressing it as much as possible. If you’re using ChatGPT on a corporate network or public Wi‑Fi, it may be blocked by a gateway; switching to a mobile hotspot often works immediately.
If the same file behaves differently across browsers, start by clearing the cache and disabling “download/script/privacy” type extensions, then restart the browser. You can also open ChatGPT in an incognito window to avoid old login states or plugin rules affecting the upload process.
Messages won’t send or “request error”: check the network first, then the conversation and browser
If ChatGPT shows a request error or send failure, it’s often a brief network fluctuation or the page state getting stuck. Refresh the page; if that doesn’t work, start a new chat and send the same content to avoid an old conversation context glitch. If you see something like a rate limit or too many requests, wait a bit and try again, and reduce extremely long paste-ins all at once.
Browser-side blocking is also common: turn off your proxy or switch nodes, add the site to the allowlist, and temporarily disable ad-blocking extensions. As a last step, try switching browsers or logging into ChatGPT on another device to quickly confirm whether it’s an environment issue or an account issue.


