TypeError: dispatcher.getOwner is not a function on RR7+React19

[AbhiPrasad]

https://discord.com/channels/621778831602221064/1400566232754688161/1400566232754688161

using sentry/react-router 10.0.0, react router 7.5.3 and react 19.1.0 i get this error in the prod build. any ideas what could be going wrong? some sort of react version mismatch?

Works after you set NODE_ENV=production

Related issue: remix-run/react-router#12138

[linear]

JS-814 TypeError: dispatcher.getOwner is not a function on RR7+React19

[DarkIntaqt]

Hi, I am also affected by this issue and would like to bump it.
Maybe adding the corresponding labels would help to easier find this issue.

The fix did in fact solve it, but I feel like this shouldn't be a permanent solution.
I am currently using @sentry/react-router 10.22.0.

[AbhiPrasad]

Hey @DarkIntaqt could you share more details about your app? What version of react router and react are you using? Are you also seeing this for prod builds? Are you able to provide a reproduction?

[DarkIntaqt]

Hi, thank you for your quick response.

My app was a blank one as I was going to start a new project, Sentry was the first thing that I installed.

I used the following versions which are all most likely all latest.

...
  "dependencies": {
    "@react-router/node": "^7.9.2",
    "@react-router/serve": "^7.9.2",
    "@sentry/react-router": "^10.22.0",
    "isbot": "^5.1.31",
    "react": "^19.1.1",
    "react-dom": "^19.1.1",
    "react-router": "^7.9.2"
  },
...

The error only occurs in production builds and deployments, not during development.

Here is a blank react-router repository with @sentry/react-router, in which I followed the exact setup steps as in https://docs.sentry.io/platforms/javascript/guides/react-router/ (except that I used "Do you need to customize your handleRequest function?" instead of copying the entire entry.client.tsx).
The issue occurs upon running npm run build && npm run start and accessing the site. I also added the script npm run build-fix && npm run start-fix, which resolves the issue:
https://github.com/DarkIntaqt/rr7-sentry (I hope a git repo is okay, otherwise I could also share a stackblitz or smth like that)

This is the entire error message:

TypeError: dispatcher.getOwner is not a function
    at getOwner (/workspaces/codespaces-blank/node_modules/react/cjs/react.development.js:163:54)
    at Module.process.env.NODE_ENV.exports.createElement (/workspaces/codespaces-blank/node_modules/react/cjs/react.development.js:1052:9)
    at getRouteComponents (file:///workspaces/codespaces-blank/node_modules/react-router/dist/development/chunk-OIYGIGL5.mjs:7919:104)
    at file:///workspaces/codespaces-blank/node_modules/react-router/dist/development/chunk-OIYGIGL5.mjs:7939:10
    at Array.map (<anonymous>)
    at createServerRoutes (file:///workspaces/codespaces-blank/node_modules/react-router/dist/development/chunk-OIYGIGL5.mjs:7932:45)
    at ServerRouter (file:///workspaces/codespaces-blank/node_modules/react-router/dist/development/chunk-WY5IRSCW.mjs:76:16)
    at renderWithHooks (/workspaces/codespaces-blank/node_modules/react-dom/cjs/react-dom-server.node.production.js:4647:18)
    at renderElement (/workspaces/codespaces-blank/node_modules/react-dom/cjs/react-dom-server.node.production.js:4785:14)
    at retryNode (/workspaces/codespaces-blank/node_modules/react-dom/cjs/react-dom-server.node.production.js:5503:16)
TypeError: dispatcher.getOwner is not a function
    at getOwner (/workspaces/codespaces-blank/node_modules/react/cjs/react.development.js:163:54)
    at Module.process.env.NODE_ENV.exports.createElement (/workspaces/codespaces-blank/node_modules/react/cjs/react.development.js:1052:9)
    at getRouteComponents (file:///workspaces/codespaces-blank/node_modules/react-router/dist/development/chunk-OIYGIGL5.mjs:7919:104)
    at file:///workspaces/codespaces-blank/node_modules/react-router/dist/development/chunk-OIYGIGL5.mjs:7939:10
    at Array.map (<anonymous>)
    at createServerRoutes (file:///workspaces/codespaces-blank/node_modules/react-router/dist/development/chunk-OIYGIGL5.mjs:7932:45)
    at ServerRouter (file:///workspaces/codespaces-blank/node_modules/react-router/dist/development/chunk-WY5IRSCW.mjs:76:16)
    at renderWithHooks (/workspaces/codespaces-blank/node_modules/react-dom/cjs/react-dom-server.node.production.js:4647:18)
    at renderElement (/workspaces/codespaces-blank/node_modules/react-dom/cjs/react-dom-server.node.production.js:4785:14)
    at retryNode (/workspaces/codespaces-blank/node_modules/react-dom/cjs/react-dom-server.node.production.js:5503:16)
GET / 500 - - 25.575 ms

[chargome]

This still looks like an upstream issue where RR is not setting the NODE_ENV correctly for some reason.