Error in deployment the app: different react versions

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I'm making a project for my master's, and I found an error when I started the app.I deleted some widgets, but still can't find the missing part.The first error is:An error occurred while loading page 'MyFirstModule.Home'. This likely means that the page includes a broken widget. Please check that all your widgets are React Client compatible and are valid ES modules.Cannot read properties of undefined (reading 'ReactCurrentDispatcher') TypeError: Cannot read properties of undefined (reading 'ReactCurrentDispatcher') at http://localhost:8080/dist/Atlas_Core.Atlas_Default-mu0HnZ9k.js:1421:55 at http://localhost:8080/dist/Atlas_Core.Atlas_Default-mu0HnZ9k.js:21635:5AND The second error is:Cannot read properties of undefined (reading 'ReactCurrentDispatcher')TypeError: Cannot read properties of undefined (reading 'ReactCurrentDispatcher') at http://localhost:8080/dist/Atlas_Core.Atlas_Default-mu0HnZ9k.js:1421:55 at http://localhost:8080/dist/Atlas_Core.Atlas_Default-mu0HnZ9k.js:21635:5If you have any idea how to fix it, I'd be grateful.
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1 answers
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Hi Corina,


Since you're using Mendix 11.8, my first suspicion would be a widget compatibility issue rather than a problem with the page itself.


The error message specifically mentions:

"The page includes a broken widget"

and

"Please check that all your widgets are React Client compatible"


This usually happens when a Marketplace or custom widget is not fully compatible with the React Client.


If you want to keep your current widget versions, the first thing I would try is temporarily disabling the React Client:

App Settings
→ Runtime
→ Use React Client = No


If the page starts working after that change, it is a strong indication that one of the widgets is not React Client compatible.


If the issue remains, I would then try:

  1. App → Synchronize Dependencies
  2. App → Clean Deployment Directory
  3. Run the application again and perform a hard browser refresh (Ctrl+Shift+R)


After that, check whether MyFirstModule.Home contains any Marketplace or custom widgets. If it does, try updating them to the latest version or removing them temporarily to identify the one causing the issue.


Could you share whether the Home page contains any Marketplace widgets and if the issue started after installing or updating one of them?


I hope this helps answer your question. If you need any additional details, feel free to reply below.


Best regards,

Oswaldo Valles

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