# Some chats fail to load or open **URL:** \ **Category:** Bug Reports\ **Created:** [December 31, 2025, 11:26pm UTC](https://forum.cursor.com/t/some-chats-fail-to-load-or-open/147758 "2025-12-31T23:26:43Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![ramizik](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/ramizik/32/86630_2.png) [@ramizik](https://forum.cursor.com/u/ramizik)\ **Post date:** [December 31, 2025, 11:26pm UTC](https://forum.cursor.com/t/some-chats-fail-to-load-or-open/147758/1 "2025-12-31T23:26:43Z")
### Where does the bug appear (feature/product)? Cursor IDE ### Describe the Bug Some chats in the “Agents” tab become inaccessible. Clicking a chat (last opened ~7 days ago) either: - Does not open the chat panel - Opens the panel in the editor after multiple clicks but never loads, even after waiting This appears limited to specific chats; other chats open normally. The affected chat was previously functional. ### Steps to Reproduce 1. Open Cursor 2. Go to the “Agents” tab 3. Click a chat that was last opened ~7 days ago (or older) 4. Observe one of: - The chat panel does not appear - The chat panel appears in the editor but remains in a loading state indefinitely ### Expected Behavior 864e5001-7621-47fa-963a-a5674041f6be ### Screenshots / Screen Recordings ### Operating System Windows 10/11 ### Current Cursor Version (Menu → About Cursor → Copy) Version: 2.3.15 (user setup) VSCode Version: 1.105.1 Commit: bb2dbaacf30bb7eb9fd48a37812a8f326defa530 Date: 2025-12-30T20:30:37.151Z 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 10.0.26200 ### Additional Information Reproducible with the same chat Other chats in the list open normally Multiple clicks sometimes make the panel appear, but it still does not load Waiting does not resolve the loading state ### Does this stop you from using Cursor No - Cursor works, but with this issue ---
**Author:** ![ramizik](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/ramizik/32/86630_2.png) [@ramizik](https://forum.cursor.com/u/ramizik)\ **Post date:** [December 31, 2025, 11:27pm UTC](https://forum.cursor.com/t/some-chats-fail-to-load-or-open/147758/2 "2025-12-31T23:27:41Z")
I apologize for loud music in the video (Mute it) ---
**Author:** ![deanrie](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/deanrie/32/1263_2.png) [@deanrie](https://forum.cursor.com/u/deanrie)\ **Post date:** [January 1, 2026, 9:25am UTC](https://forum.cursor.com/t/some-chats-fail-to-load-or-open/147758/3 "2026-01-01T09:25:57Z")
Hey, thanks for the report. This is a known issue with loading older chats that affects some users on Windows. It can sometimes happen when loading long chats with lots of code blocks. The UI component can’t handle initialization. For debugging, please try: 1. Help → Toggle Developer Tools → Console 2. Click the affected chat 3. Check the Console for errors, especially `[composer] No composer data handle found` or any authentication errors For the future, I’d recommend: - Export important chats regularly (three dots → Export Chat) - Install the SpecStory extension for automatic backups Please share what you see in the console when you click the chat. ---
**Author:** ![pachocastillosr](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/pachocastillosr/32/110143_2.png) [@pachocastillosr](https://forum.cursor.com/u/pachocastillosr)\ **Post date:** [January 1, 2026, 4:01pm UTC](https://forum.cursor.com/t/some-chats-fail-to-load-or-open/147758/4 "2026-01-01T16:01:52Z")
This happened to me as well, today I opened cursor and it prompted me to set the initial settings as if I was a new user, it also prompted me to log in with github again, it has no acess to my previous chats, everything seems to be wiped out, except my code (fortunately)! ---
**Author:** ![liangjianmin](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/liangjianmin/32/59639_2.png) [@liangjianmin](https://forum.cursor.com/u/liangjianmin)\ **Post date:** [January 2, 2026, 9:56am UTC](https://forum.cursor.com/t/some-chats-fail-to-load-or-open/147758/5 "2026-01-02T09:56:48Z")
Can the feature configuration of version 1.7 be restored? Don’t you think loading chat logs is slow every time you open them? This experience is terrible ![image](https://us1.discourse-cdn.com/cursor1/original/3X/6/b/6b76f9cd59f2ae5988d96babb3897283d73c97ec.png) ---
**Author:** ![ramizik](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/ramizik/32/86630_2.png) [@ramizik](https://forum.cursor.com/u/ramizik)\ **Post date:** [January 2, 2026, 10:22am UTC](https://forum.cursor.com/t/some-chats-fail-to-load-or-open/147758/6 "2026-01-02T10:22:45Z")
Here are logs: ```auto workbench.desktop.main.js:13689 [composer] Error hydrating conversation checkpoint from blob store Error: illegal tag: field no 0 wire type 0 composerMigrations] error migrating composer instance data: ConnectError: [data_loss] Failed to hydrate conversation checkpoint from blob store workbench.desktop.main.js:566 [composer] Error loading composer data: Error: [composerMigrations] error migrating composer instance data: ConnectError: [data_loss] Failed to hydrate conversation checkpoint from blob store [composer] Error hydrating conversation checkpoint from blob store Error: illegal tag: field no 0 wire type 0 [composerMigrations] error migrating composer instance data: ConnectError: [data_loss] Failed to hydrate conversation checkpoint from blob store [composer] Error loading composer data: Error: [composerMigrations] error migrating composer instance data: ConnectError: [data_loss] Failed to hydrate conversation checkpoint from blob store workbench.desktop.main.js:13855 [composer] No composer data handle found [handleDeselectingComposer] [composer] Error hydrating conversation checkpoint from blob store Error: illegal tag: field no 0 wire type 0 workbench.desktop.main.js:561 [composerMigrations] error migrating composer instance data: ConnectError: [data_loss] Failed to hydrate conversation checkpoint from blob store [composer] Error loading composer data: Error: [composerMigrations] error migrating composer instance data: ConnectError: [data_loss] Failed to hydrate conversation checkpoint from blob store [composer] Error hydrating conversation checkpoint from blob store Error: illegal tag: field no 0 wire type 0 [composerMigrations] error migrating composer instance data: ConnectError: [data_loss] Failed to hydrate conversation checkpoint from blob store [composer] Error loading composer data: Error: [composerMigrations] error migrating composer instance data: ConnectError: [data_loss] Failed to hydrate conversation checkpoint from blob store [composer] No composer data handle found [handleDeselectingComposer] ``` ---
**Author:** ![deanrie](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/deanrie/32/1263_2.png) [@deanrie](https://forum.cursor.com/u/deanrie)\ **Post date:** [January 2, 2026, 11:12am UTC](https://forum.cursor.com/t/some-chats-fail-to-load-or-open/147758/7 "2026-01-02T11:12:24Z")
Thanks for the logs! This confirms the issue: this chat’s checkpoint data got corrupted during migration. ```auto [data_loss] Failed to hydrate conversation checkpoint from blob store illegal tag: field no 0 wire type 0 ``` Unfortunately, this specific chat can’t be recovered. The checkpoint data is corrupted at the serialization level. This is a known issue, and the team is working on improving chat storage stability. To help prevent data loss in the future: - Export important chats regularly (three dots, then Export Transcript) - The SpecStory extension can help with automatic backups Sorry for the trouble. ---
**Author:** ![Eddy](https://avatars.discourse-cdn.com/v4/letter/e/57b2e6/32.png) [@Eddy](https://forum.cursor.com/u/Eddy)\ **Post date:** [January 2, 2026, 11:22am UTC](https://forum.cursor.com/t/some-chats-fail-to-load-or-open/147758/8 "2026-01-02T11:22:51Z")
same, once updating to the latest stable version, never happened before and the chat wasnt even long BUT actually ALL OLDER chats are corrupted now??? and the Agent chat window freezes up ---
**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:** [January 24, 2026, 11:23am UTC](https://forum.cursor.com/t/some-chats-fail-to-load-or-open/147758/9 "2026-01-24T11:23:12Z")
Closed on January 24, 2026, 11:23am UTC This topic was automatically closed 22 days after the last reply. New replies are no longer allowed.