App initialization failure: Decoding failed.

HI ​@R Heesen,

Thanks for reaching out!

I have your post converted into a support ticket. PLease share your console logs and HAR files with supports so it can be investigated more thoroughly. Kindly check your inbox for support’s response.

here's a full txt file report of the entire console with this issue:

downloadable font: kern: Too large subtable (font-family: "OpenSans" style:normal weight:400 stretch:100 src index:0) source: https://miro.com/app/static/d8a7ca42a20caea5.woff2

downloadable font: Table discarded (font-family: "OpenSans" style:normal weight:400 stretch:100 src index:0) source: https://miro.com/app/static/d8a7ca42a20caea5.woff2

Ignoring unsupported entryTypes: longtask. c~appEntry~canvasShowcas~viewOnlyCanvas.96c7af9551245aed.js:5:22641

Some cookies are misusing the recommended “SameSite“ attribute 7

Uncaught (in promise) TypeError: Decoding failed. 2

TypeError: Decoding failed. library-sentry.431d6daedeaa640e.js:7:6946

React Router caught the following error during render TypeError: Decoding failed.

Object { componentStack: "\nLazy\nD@https://mirostatic.com/app/static/vendor-appEntry.7fe8a91a0d9ad0f7.js:53:3005\nR@https://mirostatic.com/app/static/vendor-appEntry.7fe8a91a0d9ad0f7.js:53:2401\nW@https://mirostatic.com/app/static/vendor-appEntry.7fe8a91a0d9ad0f7.js:53:6600\nK@https://mirostatic.com/app/static/vendor-appEntry.7fe8a91a0d9ad0f7.js:53:6090\nB@https://mirostatic.com/app/static/vendor-appEntry.7fe8a91a0d9ad0f7.js:53:4561\nSuspense\nt@https://mirostatic.com/app/static/vendor-appEntry.7fe8a91a0d9ad0f7.js:27:136673" }

library-sentry.431d6daedeaa640e.js:7:6946

downloadable font: kern: Too large subtable (font-family: "OpenSans" style:normal weight:700 stretch:100 src index:0) source: https://mirostatic.com/app/static/2f5e8dcf6e47bf00.woff2

downloadable font: Table discarded (font-family: "OpenSans" style:normal weight:700 stretch:100 src index:0) source: https://mirostatic.com/app/static/2f5e8dcf6e47bf00.woff2

MouseEvent.mozInputSource is deprecated. Use PointerEvent.pointerType instead. vendor-appEntry.7fe8a91a0d9ad0f7.js:88:133296

Source map error: Error: "sources" is a required argument.

Resource URL: https://mirostatic.com/app/static/library-sentry.431d6daedeaa640e.js

Source Map URL: https://miro.com/app/static/library-sentry.431d6daedeaa640e.js.map

Source map error: Error: "sources" is a required argument.

Resource URL: https://mirostatic.com/app/static/vendor-appEntry.7fe8a91a0d9ad0f7.js

Source Map URL: https://miro.com/app/static/vendor-appEntry.7fe8a91a0d9ad0f7.js.map

Source map error: Error: "sources" is a required argument.

Resource URL: https://mirostatic.com/app/static/c~appEntry~canvasShowcas~viewOnlyCanvas.96c7af9551245aed.js

Source Map URL: https://miro.com/app/static/c~appEntry~canvasShowcas~viewOnlyCanvas.96c7af9551245aed.js.map

Hello,
I have exactly the same issue since a few weeks, I can’t work on Miro either. I’m on Firefox Windows 11 too. How to solve the problem ? Thank you !

Hi ​@MarionH,

Thanks for jumping in on this thread!

I have your comment converted into a support ticket as well. Please wait for support’s response in your inbox.

I have the same problem, what do I do?

Hi ​@Glasha,

Thanks for jumping in! Is the error message the same as the one shown in this thread - App initialization failure: Loading chunk 99640 failed?

Hello

i am on windos 11 fierfox myself and have the exact same error i tryed everything to resolf it but i can not acces miro anymore 

pls help:)

Hi ​@Simon Heggenstaller,

Thanks for reaching out! Since you're on Windows 11 and using Firefox, let's try to narrow down the issue.

Can you confirm if you're seeing the exact error message "App initialization failure: Loading chunk 99640 failed"? Also, when you say you’ve tried "everything," could you share what specific troubleshooting steps you’ve already taken? For example:

• Have you cleared your browser cache and cookies?

• Have you disabled any browser extensions that might interfere with Miro?

• Is your Firefox browser up to date?

• Have you tried using Miro in another browser (e.g., Chrome or Edge) to see if the issue is browser-specific?

Let me know what you've tested so far.