Maybe it's temporary solution, but If you mean that images are not displayed from assets, you can try to create AssetManifest.json.
I took the example from here
https://github.com/GeekyAnts/FlatApp-Flutter/blob/master/ios/Flutter/flutter_assets/AssetManifest.json
The steps that I did:

1. move all my images from ./image folder to ./web/assets/images.
2. create AssetManifest.json in ./web/assets/ folder using this style:
   {
   "assets/images/googlephotos.png":[
   "assets/images/googlephotos.png"
   ],
   "assets/images/pinterest.png":[
   "assets/images/pinterest.png"
   ]

}
3) load images using Image(image: AssetImage(path)) where path was like this "images/googlephotos.png"

Also, I just found out, that you can use rootBundle API for this.
On the "3. Assets" section here https://www.didierboelens.com/2019/05/flutter-for-the-web/ you can see the instruction.

No, I meant Material Icons are not getting rendered.

Thank you. It worked.

Thank you Ciokan

Your solution worked for me too.

Thanks!!! it worked 👍

This works for material icon fonts, is there a way to get material icon images? Like calendar_today, etc...

MaterialIcons-Regular.ttf

Hey there ! where do I download this file??

Found it here !
https://www.cdnpkg.com/mdui/file/MaterialIcons-Regular.ttf/#

This doesn't work for me with Flutter 1.22.0-12.1.pre when releasing on NGINX

This doesn't work for me with Flutter 1.22.0-12.1.pre when releasing on NGINX

For anyone who is still having this problem. I finally found a solution that worked for me 😊.

In newer versions of Flutter where the original problem is already fix, your previous fix brakes the Icons in the updated version, let me explain:

If you have tried a previous solution of adding MaterialIcons-Extended.ttf to assets/fonts/, and creating and/or updating FontManifest.json.

Erase the font from assets/fonts/ and erase the FontManifest.json file you previously created.
And of course be sure to have uses-material-design: true in the pubspec.yaml

Then flutter clean and you are good to go

It took me an incredible amount of time to fix this, hopefully this would help someone :)

Make sure to add

flutter:
  uses-material-design: true

to your pubspec.yaml and also create a file FontManifest.json inside web/assets directory containing [{"fonts":[{"asset":"fonts/MaterialIcons-Regular.ttf"}],"family":"MaterialIcons"}]. Restart the server and it should work, it did for me after searching 3 hours yesterday.

Make sure to also download the MaterialIcons-Regular.tff font inside web/assets/fonts dir as well.

In newer versions you have to undo all these changes to make your Icons work in Flutter web again.

I have an issue here, I am using FontManifest.json to also render my app's font.

If I remove it, as per @puertojose's suggestion, icons start working again but I lose my font styles. I'm in a deadlock here, any suggestion?

Be careful, the most upvoted solution is now obsolete as of 2021.
In my case (custom icons), I had forgotten to change the line with the right icon family name:

static const _kFontFam = {your icon family name};

of the dart file.

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.