Unable to locate package dotnet-sdk-3.1 on Ubunto 18.04.3

[PtrStruct]

I can't run the sudo apt-get install dotnet-sdk-3.1 command without getting that error

General

I'm currently running Ubuntu 18.04.3 and I'm trying to install the .NET SDK so I can develop my ASP.NET Core 3.1 MVC web page but I keep running into that error every time I try to run it.

I even tried the manual approach it suggested.
These are the resources I've been using
https://docs.microsoft.com/en-us/dotnet/core/install/linux-package-manager-ubuntu-1804

https://docs.microsoft.com/en-us/dotnet/core/install/linux-package-manager-ubuntu-1804#troubleshoot-the-package-manager

Is this a common issue?

[dagood]

Can you double check the output of the apt-get update step, to check for errors?

I believe you probably hit this outage, which is being worked on: #3988. When the update fails, that means your machine isn't able to get the list of packages, so apt-get install will tell you Unable to locate package.

[dagood]

Closing due to lack of info. It seems safe to assume this was the outage, which was fixed last week.