Error loading ICU asset

[sergeyzwezdin]

I'm getting Error: Error loading ICU asset. while adding BlazorWasmAntivirusProtection that runs under Azure WAF.

This is how it looks like:

Another question is whether it's confirmed that BlazorWasmAntivirusProtection works successfully with Azure WAF?

Steps to reproduce:

1. dotnet new blazorwasm -n test
2. dotnet add package BlazorWasmAntivirusProtection

Publish, upload to Azure AppService that secured with WAF.

Project .csproj looks like this:

<Project Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">

  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
    <Nullable>enable</Nullable>
    <ImplicitUsings>enable</ImplicitUsings>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="BlazorWasmAntivirusProtection" Version="1.8.5" />
    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="6.0.7" />
    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="6.0.7" PrivateAssets="all" />
  </ItemGroup>

</Project>

[FiberKaliber]

@sergeyzwezdin We are facing the exact same error with this package under Azure WAF, did you find any solution to this?

[FiberKaliber]

@sergeyzwezdin Our devops team found out that Azure WAF where still blocking requests but this time for .dat and .blat files.
Easiest way to find these is to look at "runtime": { ... } in ".../publish/wwwroot/_framework/blazor.boot.json".

The only solution we found was to specify a custom network rule in Azure WAF for these specific files to be allowed for request for our host. This is not optimal but no available configuration on this package seemed to work.