Server Error 500

[heyorcalaundry-rgb]

🏷️ Discussion Type

Question

💬 Feature/Topic Area

Copilot in GitHub

Body

I am not a developer, but have been using VS Code and Github Copilot to build a web based app that has become quite large, I think around 400k lines of code.

As of today, i have been getting the following error, can someone tell me why and what i should be doing to fix it.

Sorry, your request failed. Please try again.

Copilot Request id: 87413d04-e75e-4de0-aa8f-2b6d0220b0f5

GH Request Id: C6B2:17B605:941DA5:A8E837:69CF90D0

Reason: Server error: 500

[im-tomasz]

Hi,

the Server error : 500 "is a generic "catch-all" response to server issues, indicating that the server cannot find a more appropriate 5XX error to respond with." (more info about it on the MDN Documentation)

without seeing your code, it can come from everywhere, there is no magic answer, unfortunately.

more questions to dive into the problem :
since when this message shows up ?
did everything worked fine before ?
is your server currently running ?

[asaddevx]

Hi @heyorcalaundry-rgb,

First — congratulations on building a 400k line web app as a non-developer! That's genuinely impressive. The 500 error you're seeing is frustrating, but I can help you fix it.

What's Actually Happening

A 500 Internal Server Error means GitHub's Copilot servers couldn't process your request [citation:7]. This is NOT an issue with your code or your computer — it's a problem on GitHub's side or with how Copilot is handling your large project [citation:1].

Given your project size (400k lines), here are the most likely causes and solutions:

---

Solution 1: Reduce Context Size (Most Likely to Work)

Copilot has a limited "context window" — it can only "see" a certain amount of code at once. With 400k lines, you're probably exceeding that limit [citation:2][citation:10].

What to do:

1. Don't ask Copilot to look at your entire codebase — instead, open only the specific file you're working on
2. Break your project into smaller files (400k lines in one file is too large) [citation:10]
3. Start a fresh chat session when working on a new feature (don't let the conversation get too long) [citation:1]

Why this works: A GitHub engineer confirmed that long-running conversations with GPT models trigger 500 errors [citation:1]. Starting fresh bypasses this.

---

Solution 2: Check if GitHub Copilot Is Having Outage

Copilot recently had a major incident on February 9, 2026, where users saw exactly this error: "Server error: 500" [citation:7].

What to do:

1. Check the GitHub Status Page: https://www.githubstatus.com/ [citation:6]
2. If there's an active incident, wait it out — these are usually resolved within hours [citation:7]

---

Solution 3: Try a Different AI Model

If you're using GPT-5.x or Gemini models, there's a known bug causing 500 errors [citation:1].

What to do:

1. In Copilot Chat, try switching to Claude 3.5 Sonnet or GPT-4o instead
2. See if the error stops

Multiple users have reported that 500 errors occur specifically with GPT-5.2 Codex and Gemini Pro 2.5, but work fine with Claude [citation:1][citation:5].

---

Solution 4: Re-authenticate Copilot

Sometimes the authentication token gets corrupted.

What to do:

1. In VS Code, open Command Palette (Ctrl+Shift+P or Cmd+Shift+P)
2. Type: GitHub Copilot: Sign Out
3. Then sign back in

On Windows, also check: Control Panel → Credential Manager → Windows Credentials → Remove any GitHub credentials, then restart VS Code [citation:6].

---

Solution 5: Update Everything

What to do:

1. Update VS Code: Help → Check for Updates [citation:5]
2. Update GitHub Copilot extension
3. Restart VS Code completely (not just reload — close and reopen)

---

Summary: Try in This Order

Step	Action	Time Needed
1	Start a fresh chat session	10 seconds
2	Check GitHub Status Page	1 minute
3	Switch to Claude model	30 seconds
4	Sign out and back into Copilot	2 minutes
5	Update VS Code and restart	3 minutes

---

One Important Note

The other answer asked if "your server is currently running" — that's actually not relevant here. The 500 error is coming from GitHub's Copilot servers, not your local web server. Your app code is fine. This is a Copilot service issue, not a bug in your app [citation:7].

[heyorcalaundry-rgb]

thanks for the reply, i tried everything except for the fresh chat session (step 1), which was the solution!

[harish124]

Please share the entire error stack trace to suggest solutions.

If it's just an issue with co-pilot, simple retry is enough. Maybe you have hit temporary usage limits. Try again maybe after an hour or next day based on your subscription plan of co-pilot.

Error could also occur if you're sending a huge prompt.

But to correctly diagnose we need logs and have a look at code: Check if any API call is failing that returns 500.

You should add more debug logger statements in your code and share them to help us suggest better solutions.

[Gecko51]

With a 400k line project the most likely thing happening is that your chat history has gotten too long and Copilot is hitting its context window limit. The 500 is coming from GitHub's servers, not from your code.

Quickest fix: open a new chat session. Click the "+" to start a fresh conversation. That clears the accumulated context and usually fixes it immediately.

If it keeps happening even on new chats, check https://www.githubstatus.com/ to rule out an active outage.

For working long-term on a large project, a few habits that help: keep each chat session focused on one file or one feature at a time, avoid letting conversations run for hours, and don't ask Copilot to "look at the whole codebase" in a single prompt. The context window has a hard ceiling and 400k lines means you'll hit it fast if you're not careful about scope.

If one model is consistently erroring, try switching from the model dropdown in the chat pane. Sometimes one backend is degraded while others are fine.

[heyorcalaundry-rgb]

Thanks Geoko51,

you are spot on with the chat history being too long! I started a new chat and the error immediately disappeared. Thanks for the chat habits you suggested, i will definitely be doing this moving forward. Not being a developer i am sure you can imagine how much is going on in the chat!

I should of had a bit more patience and waited for a response here. I rushed off and installed Augment because i was told it would fix the issue, which it did for obvious the obvious reason, now that i know was the chat history size.

For what its worth, Augment is not cheap when compared to Copilot!

[Dhrona1421]

This error (500) is a server-side issue from GitHub Copilot, but in large projects like yours (~400k lines), it can also be triggered by how much context or data Copilot is trying to process at once.

A few things you can try:

1. Reload or restart VS Code – sometimes the Copilot extension gets stuck.
2. Sign out and sign back into GitHub in VS Code.
3. Update VS Code and the Copilot extension to the latest version.
4. Disable and re-enable the Copilot extension.
5. Check your internet connection or try switching networks.

Also, avoid sending very large prompts or pasting huge chunks of code at once, as that can cause requests to fail.

If the issue still continues, it’s likely a temporary backend issue from GitHub’s side, and you may need to wait and try again later.

In short, it’s not an issue with your code itself, but more about Copilot limits or temporary server problems.