# Troubleshooting Claude 4.1 Opus in Web Agent **URL:** \ **Category:** Bug Reports\ **Created:** [September 8, 2025, 4:29am UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926 "2025-09-08T04:29:09Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Battlezone](https://avatars.discourse-cdn.com/v4/letter/b/ecae2f/32.png) [@Battlezone](https://forum.cursor.com/u/Battlezone)\ **Post date:** [September 8, 2025, 4:29am UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/1 "2025-09-08T04:29:09Z")
This keeps happening to me only on Claude 4.1 Opus. I tested the same prompt on GPT5 and it works fine. I cannot use Claude 4.1 Opus at all. I asked my colleague who also has a subscription, and all models work fine for him. ![image](https://us1.discourse-cdn.com/cursor1/original/3X/f/0/f0e9f87919d3eebe393172098682a7ccafb578e5.png) I get that response instantly. @condor bc-4aa01f6d-3894-4db6-b8bb-9bffc067909e ---
**Author:** ![condor](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/condor/32/73148_2.png) [@condor](https://forum.cursor.com/u/condor)\ **Post date:** [September 8, 2025, 10:15am UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/2 "2025-09-08T10:15:25Z")
hi @Battlezone before we look into the actual request details I would like to gather more clearer information what is occuring as it is not easy to reproduce. Do you use the same Cursor version, repository and project setup as your colleagues? Please share the Cursor version you use and how you access Background Agents. There may be some difference in prompt if AI does not perform changes but says it is about a UI issue that was not implemented. Are you able to share approximately how you ask AI in the prompt? Example: AI follows wording sometimes very precise. If we ask AI to “Investigate why something is happening” it will do so without providing changes. Better alternative would be to prompt AI “There is an UI lag with rendering of widgets, find a solution and implement it.” since this instructs AI to do the change. ---
**Author:** ![Battlezone](https://avatars.discourse-cdn.com/v4/letter/b/ecae2f/32.png) [@Battlezone](https://forum.cursor.com/u/Battlezone)\ **Post date:** [September 8, 2025, 7:16pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/3 "2025-09-08T19:16:33Z")
My apologies for not being clear enough, but I am using the web version so I am assuming it’s the latest version. I have tried different kinds of prompts, even very simple ones such as “remove this code”. I also tried asking the model to make a small calculator script in python in an empty fresh repository. Same issue. It always says “No changes were made”. Then it describes what the session was supposedly about, but that no changes were made. This only happens with 4.1 Opus. ---
**Author:** ![stanleyrya](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/stanleyrya/32/78836_2.png) [@stanleyrya](https://forum.cursor.com/u/stanleyrya)\ **Post date:** [September 8, 2025, 7:42pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/4 "2025-09-08T19:42:42Z")
Same issue that I’m facing. Happens to all non-default models for me. > [@Cursor Background Agents build fails](https://forum.cursor.com/t/cursor-background-agents-build-fails/132521/3): > > Where does the bug appear (feature/product)? Background Agent (GitHub, Slack, Web, Linear) Describe the Bug Hello! I’ve been using cursor exclusively in mobile web mode. I create background agents to make code changes, review them, then commit and deploy with an automated GitHub workflow. Starting yesterday all of my agents began failing with“no changes made” except for the default one. I can’t tell if I’ve hit my limit or not because the usage tab on web only shows a list of requests and tok… ---
**Author:** ![condor](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/condor/32/73148_2.png) [@condor](https://forum.cursor.com/u/condor)\ **Post date:** [September 11, 2025, 6:30pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/5 "2025-09-11T18:30:24Z")
Thank you, I have sent the details to our team. ---
**Author:** ![Battlezone](https://avatars.discourse-cdn.com/v4/letter/b/ecae2f/32.png) [@Battlezone](https://forum.cursor.com/u/Battlezone)\ **Post date:** [September 18, 2025, 4:11pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/6 "2025-09-18T16:11:10Z")
Update: the problem got worse, and now all models have this issue (not just Opus 4.1). ---
**Author:** ![condor](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/condor/32/73148_2.png) [@condor](https://forum.cursor.com/u/condor)\ **Post date:** [September 18, 2025, 4:56pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/7 "2025-09-18T16:56:00Z")
Could you share a Request ID for a model that was not Opus 4.1 so the team can check it for issues? ---
**Author:** ![Battlezone](https://avatars.discourse-cdn.com/v4/letter/b/ecae2f/32.png) [@Battlezone](https://forum.cursor.com/u/Battlezone)\ **Post date:** [September 18, 2025, 8:48pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/8 "2025-09-18T20:48:11Z")
I have deleted that request, and now it seems like I can’t even select my repository anymore (I get the stop sign when I hover over “select repository” and it remains greyed out), so unfortunately I can’t provide a request id. Looks like some kind of ban. ![image](https://us1.discourse-cdn.com/cursor1/original/3X/9/2/9220beac193e9a8147016e31488e9938dbe83f92.png) ![image](https://us1.discourse-cdn.com/cursor1/original/3X/d/f/df02bbb86d4616069b3fb96c25e10c635c3d7ea1.png) “cursor-not-allowed” ---
**Author:** ![condor](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/condor/32/73148_2.png) [@condor](https://forum.cursor.com/u/condor)\ **Post date:** [September 18, 2025, 8:52pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/9 "2025-09-18T20:52:27Z")
Can be a connection issue with GitHub. Could you check in Dashboard if you have the connection setup (in rare cases it cant connect temporarily) ---
**Author:** ![Battlezone](https://avatars.discourse-cdn.com/v4/letter/b/ecae2f/32.png) [@Battlezone](https://forum.cursor.com/u/Battlezone)\ **Post date:** [September 18, 2025, 8:53pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/10 "2025-09-18T20:53:29Z")
Looks fine from my UI end, and the permissions are set on github ![image](https://us1.discourse-cdn.com/cursor1/original/3X/e/3/e32482b8e1ffb1bdaadf12d2b4a9105dc195e2ef.png) ---
**Author:** ![condor](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/condor/32/73148_2.png) [@condor](https://forum.cursor.com/u/condor)\ **Post date:** [September 18, 2025, 8:54pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/11 "2025-09-18T20:54:20Z")
Is there any error in the browser Developer Tools \> Console? I can’t reproduce the issue, on my side the repos are loading. ---
**Author:** ![Battlezone](https://avatars.discourse-cdn.com/v4/letter/b/ecae2f/32.png) [@Battlezone](https://forum.cursor.com/u/Battlezone)\ **Post date:** [September 18, 2025, 8:55pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/12 "2025-09-18T20:55:49Z")
> agents:1 Uncaught (in promise) NotSupportedError: Failed to load because no supported source was found. > agents:1 is deprecated. Please include > 1dc5edff-773d31d3e99f3e28.js?dpl=dpl\_BqdPCBEg2FpbKBBkFqWArvnpvQ78:1 [Intervention] Images loaded lazily and replaced with placeholders. Load events are deferred. See [https://go.microsoft.com/fwlink/?linkid=2048113](https://go.microsoft.com/fwlink/?linkid=2048113) > api/background-composer/get-pull-request-merge-status:1 Failed to load resource: the server responded with a status of 500 () > 2463-6a643ba435b1b4fe.js?dpl=dpl\_BqdPCBEg2FpbKBBkFqWArvnpvQ78:1 Error fetching PR merge status: Error: Failed to fetch PR merge status: > at C (2463-6a643ba435b1b4fe.js?dpl=dpl\_BqdPCBEg2FpbKBBkFqWArvnpvQ78:1:65126) > C @ 2463-6a643ba435b1b4fe.js?dpl=dpl\_BqdPCBEg2FpbKBBkFqWArvnpvQ78:1 > api/background-composer/list-background-composer-secrets:1 Failed to load resource: the server responded with a status of 500 () > 816865d8-52de2be79204793c.js?dpl=dpl\_BqdPCBEg2FpbKBBkFqWArvnpvQ78:2 Highcharts warning: Consider including the “accessibility.js” module to make your chart more usable for people with disabilities. Set the “accessibility.enabled” option to false to remove this warning. See [Accessibility module | Highcharts](https://www.highcharts.com/docs/accessibility/accessibility-module). ![image](https://us1.discourse-cdn.com/cursor1/original/3X/5/9/598c8b28fb8724be498bd05407342c90a10aba57.png) ---
**Author:** ![condor](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/condor/32/73148_2.png) [@condor](https://forum.cursor.com/u/condor)\ **Post date:** [September 18, 2025, 8:59pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/13 "2025-09-18T20:59:14Z")
cc @andrewh ---
**Author:** ![Battlezone](https://avatars.discourse-cdn.com/v4/letter/b/ecae2f/32.png) [@Battlezone](https://forum.cursor.com/u/Battlezone)\ **Post date:** [September 18, 2025, 9:06pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/14 "2025-09-18T21:06:51Z")
I have also noticed that there’s some inconcistencies (kind of obsolete data still being used) when I switch browsers. On Chrome, which I used a lot, I still see an old repository that I already unlinked, but on Edge I see “select a repository”. Also, on Edge I get “Connect your github account” for some reason although I’ve already connected it. ---
**Author:** ![Battlezone](https://avatars.discourse-cdn.com/v4/letter/b/ecae2f/32.png) [@Battlezone](https://forum.cursor.com/u/Battlezone)\ **Post date:** [September 24, 2025, 1:32pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/15 "2025-09-24T13:32:28Z")
@condor The repository selection issue has already been solved, yet I still can’t use any of the models except for Supernova. Note that even after my subscription was renewed, I still could not use 4.1 Opus! (I get the “no changes were made”). I am paying for Pro and not using student discount.. ---
**Author:** ![condor](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/condor/32/73148_2.png) [@condor](https://forum.cursor.com/u/condor)\ **Post date:** [September 24, 2025, 7:01pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/17 "2025-09-24T19:01:42Z")
Thank you for the bump, I have sent the details to the team for review. ---
**Author:** ![condor](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/condor/32/73148_2.png) [@condor](https://forum.cursor.com/u/condor)\ **Post date:** [October 1, 2025, 10:12pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/18 "2025-10-01T22:12:10Z")
@Battlezone has the issue been resolved for you, or if not, could you please post a new bcid so the team can have a look with recent changes? ---
**Author:** ![Battlezone](https://avatars.discourse-cdn.com/v4/letter/b/ecae2f/32.png) [@Battlezone](https://forum.cursor.com/u/Battlezone)\ **Post date:** [October 1, 2025, 10:20pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/19 "2025-10-01T22:20:50Z")
I have just tried it and it seems to work fine (?) I only tested it on one repository though. Is this a new fix? ---
**Author:** ![condor](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/condor/32/73148_2.png) [@condor](https://forum.cursor.com/u/condor)\ **Post date:** [October 1, 2025, 11:19pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/20 "2025-10-01T23:19:59Z")
Yes team has been working on it and asked me to check with you. ---
**Author:** ![system](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/system/32/99069_2.png) [@system](https://forum.cursor.com/u/system)\ **Post date:** [October 23, 2025, 11:20pm UTC](https://forum.cursor.com/t/troubleshooting-claude-4-1-opus-in-web-agent/132926/21 "2025-10-23T23:20:49Z")
This topic was automatically closed 22 days after the last reply. New replies are no longer allowed.