Can’t acccess web api (Azure Container instances)

I have pushed the following image to the registry in Azure:

#See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging.

FROM mcr.microsoft.com/dotnet/aspnet:5.0-buster-slim AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:5.0-buster-slim AS build
WORKDIR /src
COPY ["WEBAPI.csproj", ""]
RUN dotnet restore "./WEBAPI.csproj"
COPY . .
WORKDIR "/src/."
RUN dotnet build "WEBAPI.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "WEBAPI.csproj" -c Release -o /app/publish

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "WEBAPI.dll"]

This is a simple web api.

I have then started a Aazure Container Instance of this, and it starts without problem.
However, when I try to navigate to my api using the generated IP adress, 20.67.203.151 and also the FQDN, dockerapi.northeurope.azurecontainer.io, i can’t access it, and I really don’t know why.

I have followed this guide: https://medium.com/@krishjan05/deploy-a-net-core-web-application-to-azure-container-instance-b016c321b1de

Any suggestions?

EDIT:

Here are some information
enter image description here

Source: Docker Questions