Question, Bug, or Feature?
Type: Bug
Enter Task Name: UseDotNet
Error message when download fails incorrectly mentions "release-index.json" (should be releases-index.json).
The code in /Tasks/UseDotNetV2/versionfetcher.ts has the correct filename, but the error message dropped the s (in all possible languages it seems)

This was actually caused by GitHub where it failed to respond with the release-index.json file and instead threw an internal server error. This is working on my end again but depending on your location might require a bit more time until GitHub servers catch up.
Regarding the underlying issue, I have opened #12742 in an attempt to make the task a bit smarter when it is restoring a fixed SDK version, so that it will look at the cache first. This would have solved the issue in your case too since you depend on 3.0.100.
@poke this ticket is about the incorrect error message when we fail to download the file. The file is releases-index.json. the error message mentions release-index.json (a file which actually does not exist)
@rikogeln Oh sorry, I only really looked at the screenshot and didn鈥檛 really read what you were reporting. Really sorry about that!
@poke no worries
@bishal-pdMSFT - thanks for the fix. Some translation strings still contain the release-index.json e.g the japanese translation.