White Screen After Publishing – App Worked Perfectly Before

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Posted on by Jaw1

Hi everyone,

I’ve run into a frustrating issue and I’m hoping someone here has insight or a workaround.

I’ve built a canvas app that was working perfectly in both preview and published mode. I recently made some updates and published the latest version, but now when I (or anyone else) open the published app, it shows a white screen. The app name loads, but nothing else—no controls, no error messages, just a blank screen.

Here’s what I’ve tried so far:

Verified that the start screen has visible content (even added a simple label like “App Loaded”).
Removed App.OnStart logic entirely.
Set and unset App.StartScreen.
Tried restoring previous versions—including the original and a backup copy—but the issue persists.
Cleared browser cache, tried incognito mode, and tested in multiple browsers.
Confirmed I’m the owner of the app, so it’s not a permissions issue.
Attempted to roll back the authoring version, but some restores failed due to lock errors.

The app uses modern controls, and I suspect that may be part of the issue. I’ve seen a few threads mention similar problems, possibly tied to recent platform updates.

Has anyone else experienced this? Is there a confirmed fix or workaround? I’ve invested a lot of time into this app and would really appreciate any guidance.

Thanks in advance!

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Building Power Apps

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Fredrik_A 3,644 Super User 2026 Season 1 on at

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Hello,

ive had something similar. It started working again when i replaced all the modern controls.

Have you tried using the monitor to see if there is a specific control giving you errors?

If my response solved your issue, please mark it as ✅ Accepted Answer and give it a like.

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RH-28051255-0 3 on at

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Hi, I’m experiencing this same issue in my canvas app. I tried the suggested fix of deleting all the modern screens/controls and keeping only the customized/classic screens, but I’m still getting the blank/white screen behavior in the published app.

In my case, the home screen will display, but when I navigate to another screen the app goes blank again. So far, removing the modern screens has not resolved it.

Were you ever able to find a root cause or another workaround beyond replacing the modern controls?

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MM-13050633-0 10 on at

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You’re definitely not alone here — we’ve seen similar white screen issues in Power Apps recently, especially after updates involving modern controls or platform version changes.

A few things that have worked in similar cases:

Try disabling modern controls temporarily and republishing the app.

Create a brand-new blank canvas app and import screens/components gradually to isolate the corrupted element.

Check Monitor in Power Apps while loading the published version — sometimes hidden rendering or connector errors appear there even when the UI is blank.

If the issue started after a platform update, switching the authoring version to an earlier stable release can sometimes help, though lock/version conflicts may need Microsoft support intervention.

Also verify whether any custom components, media files, or experimental features are causing rendering failures in published mode specifically.

We’ve worked on similar Power Platform troubleshooting and optimization projects at QServices, especially around enterprise-grade canvas apps and Dynamics integrations:
https://www.qservicesit.com/power-apps-development

Hopefully Microsoft patches this soon, because the recent modern controls behavior has caused instability for quite a few developers.

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