Cursor crashes on startup (A JavaScript error occurred in the main process)

[eritislami]

Hello, today after updating Cursor I am no longer able to open the app as it reports the following exception:

Device:
MacBook Pro M2 Pro (2023)
macOS Sequoia 15.0

Cursor Version 0.42.5

A JavaScript error occurred in the main process
Uncaught Exception:
Error: Cannot find module './vs/base/common/performance'
Require stack:
- /Applications/Cursor.app/Contents/Resources/app/out/bootstrap-amd.js
- /Applications/Cursor.app/Contents/Resources/app/out/main.js
- 
at Module._resolveFilename (node:internal/modules/cjs/loader:1152:15)
at s._resolveFilename (node:electron/js2c/browser_init:2:120381)
at Module._load (node:internal/modules/cjs/loader:993:27)
at c._load (node:electron/js2c/node_init:2:13801)
at Module.require (node:internal/modules/cjs/loader:1240:19)
at require (node:internal/modules/helpers:179:18)
at Object.<anonymous> (/Applications/Cursor.app/Contents/Resources/app/out/bootstrap-amd.js:33:21)
at Module._compile (node:internal/modules/cjs/loader:1373:14)
at Module._extensions..js (node:internal/modules/cjs/loader:1432:10)
at Module.load (node:internal/modules/cjs/loader:1215:32)
at Module._load (node:internal/modules/cjs/loader:1031:12)
at c._load (node:electron/js2c/node_init:2:13801)
at Module.require (node:internal/modules/cjs/loader:1240:19)
at require (node:internal/modules/helpers:179:18)
at Object.<anonymous> (/Applications/Cursor.app/Contents/Resources/app/out/main.js:12:4578)
at Module._compile (node:internal/modules/cjs/loader:1373:14)
at Module._extensions..js (node:internal/modules/cjs/loader:1432:10)
at Module.load (node:internal/modules/cjs/loader:1215:32)
at Module._load (node:internal/modules/cjs/loader:1031:12)
at c._load (node:electron/js2c/node_init:2:13801)
at node:electron/js2c/browser_init:2:125921
at node:electron/js2c/browser_init:2:126130
at node:electron/js2c/browser_init:2:126134
at BuiltinModule.compileForInternalLoader (node:internal/bootstrap/realm:398:7)
at BuiltinModule.compileForPublicLoader (node:internal/bootstrap/realm:337:10)
at loadBuiltinModule (node:internal/modules/helpers:104:7)
at Module._load (node:internal/modules/cjs/loader:1009:17)
at c._load (node:electron/js2c/node_init:2:13801)
at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:189:12)
at node:internal/main/run_main_module:28:49

[deanrie]

Hey, try clearing the cache by following this guide:

Clearing the Cache in Visual Studio Code

[biomaven]

hey deanrie, can you clarify which cache? the article as multiple items to potentially clear. not a developer - using ai to code my first app so unsure which will do the job. here’s a screenshot of the error below. I get this error popup when I click on the cursor launch icon on the bottom windows bar

[danperks (Dan)]

Hey, this seems like a corrupted install, or an antivirus deleting Cursor’s core files!

Can you try to reinstall using a fresh installer from cursor.com and see if that works?

[biomaven]

Thanks for your reply that sounds good. When I go to the Programs in Control Panel I don’t see Cursor. How do I uninstall it?

[danperks (Dan)]

You should just be able to redownload the installer from cursor.com, and that’ll handle everything for you! The fact it isn’t in your programs to uninstall further suggests a corrupted installation.

[biomaven]

Thanks for your assistance, it worked!

[kerdofficial]

The same thing happens to me too when opening a big project which causes Cursor to crash. Reopening Cursor afterward brings up this error, and after waiting for a minute, Cursor opens normally, reopening the project that previously crashed without any problems. I didn’t need to reinstall it, and it functions perfectly otherwise-I just run into this issue sometimes.

[BaoSkyFall]

Yah. ‘Waiting’ solve my problem. Just take a break for 3-5 minutes It can open again normally. All features work

[deanrie]

For those encountering this issue, here’s a possible solution for you:

Why does my cursor 0.45.5 version automatically uninstall itself?

So the issue is related to it uninstalling it self before installing it’s update. You’ll see that the AppData is missing, but navigating to %AppData%..\Local\cursor-update\ and check for pending if you have an update. INSTALL THE UPDATE FROM HERE Do not keep downloading the version from their website as it’s not the “current” version so you end up in the same loop. I’m not sure as I haven’t put a trace on it, but I think when there’s a pending update and you close (shutdown which I often go s…

[Ashrafali58]

This worked for me Thanks!