2.1.48 Update: Persistent "Unable to reach model provider" & Chat History Loss

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

After upgrading to v2.1.48 this morning, I experienced a total service interruption where all models failed to respond.

Symptoms:

Requests get stuck on “Planning next moves”.
Eventually fails with “Connection Error” or “Unable to reach the model provider”.
Critical Data Loss: After restarting Cursor to troubleshoot, the Agent chat sessions that failed to connect disappeared completely from the sidebar history.

Troubleshooting Attempts:

Checked local network (Connection is normal).
Restarted Cursor (Resulted in lost chat history).
Restarted PC.
Reinstalled Cursor.

Current Status:

gemini 3 pro: Seems to be working now.
gpt5.1-high (and others): Still returning “Unable to reach the model provider”.

Urgent Request: Please advise on a fix for the connection issue. Additionally, is chat history recovery possible? I have lost important work data in the vanished sessions.

Steps to Reproduce

Sending a request to any model

Expected Behavior

The agents starts working

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.1.48 (system setup)
VSCode Version: 1.105.1
Commit: ce371ffbf5e240ca47f4b5f3f20efed084991120
Date: 2025-12-04T19:26:27.263Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.26100

For AI issues: which model did you use?

I testet all available models

For AI issues: add Request ID with privacy disabled

There is none

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

2

The entire GPT-5.1 series is unavailable, and the same applies to the full Claude series. They are all returning the error: ‘Unable to reach the model provider’.

3

Hey, thanks for the report.

About connecting to models:

  • Start a clean profile without extensions and settings: in the terminal
    • Windows: cursor --user-data-dir="%TEMP%/CursorTempProfile"
    • If everything works in the clean profile, it’s definitely an extension or a setting
  • Disable HTTP/2: Settings > search for HTTP/2 > enable Disable HTTP/2
  • Re-login: Settings > General > Log out, then log back in
  • Please share:
    • A screenshot of Settings > Network > Run Diagnostics
    • Logs from Help > Toggle Developer Tools > Console at the moment of the error
    • 2-3 Request IDs from the chat menu (temporarily disable Privacy Mode if it’s enabled)
    • The list of installed extensions

About missing chats:

Let me know the clean profile results and attach the diagnostics. If it reproduces in a clean profile on 2.1.48, I’ll escalate to engineering.

4

I ran the command cursor --user-data-dir="%TEMP%/CursorTempProfile", and it seems to work normally in the new window. However, my original window is still unable to reach the model provider.
Below are the network diagnostic results:

image
image1115×899 32.3 KB

It seems like everything is fine.

Below are the developer tools consoles, the screenshots below correspond to a single request:

image
image3436×959 139 KB

image
image3417×1206 250 KB

I tried logging out and logging back in, but it didn’t help.

What should I do next? Is it okay for me to continue working in the new window?

5

Thanks for the update. Since everything works in a clean profile, the cause is an extension or a setting in the original profile.

What to do next:

  • In the problematic profile, disable all extensions and restart Cursor. If the error goes away, enable them one by one.
  • Start by removing Nx Console (nrwl.angular-console) - it’s already confirmed as a cause of the same error: Unable to Reach Model Provider for All Models Except Composer1
  • If it still breaks with all extensions disabled, close Cursor and rename the profile folder: %APPDATA%\Cursor\User → User.backup, then launch Cursor and check.
  • You can work in a new window. To make the profile persistent, run: cursor --user-data-dir="C:\CursorCleanProfile» and keep using that profile.

About chat history: without a backup, recovery is usually impossible. Discussion and options are here: Urgent – Lost All Chat and Agent Mode History

Let me know if the error disappears after removing Nx Console or with extensions disabled.

6

I do not have the Nx Console extension installed, and the issue persists even after disabling all extensions. Fortunately, everything seems to be working correctly in the new window for now, so I will continue to monitor it.

1 Like
7

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