nodename nor servname provided, or not known (codeload.github.com:443)

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2, actions/upload-artifact@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

Cannot convert null literal to non-nullable reference type.

Nullability of type of parameter 'existingValue' doesn't match overridden member (possibly because of nullability attributes).

Nullability of type of parameter 'value' doesn't match overridden member (possibly because of nullability attributes).

Cannot convert null literal to non-nullable reference type.

Nullability of type of parameter 'existingValue' doesn't match overridden member (possibly because of nullability attributes).

Nullability of type of parameter 'value' doesn't match overridden member (possibly because of nullability attributes).

Cannot convert null literal to non-nullable reference type.

This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.

Unboxing a possibly null value.

This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.

Failed to download action 'https://api.github.com/repos/actions/setup-dotnet/tarball/a351d9ea84bc76ec7508debf02a39d88f8b6c0c0'. Error: nodename nor servname provided, or not known (codeload.github.com:443)

Back off 26.529 seconds before retry.

Failed to download action 'https://api.github.com/repos/actions/setup-dotnet/tarball/a351d9ea84bc76ec7508debf02a39d88f8b6c0c0'. Error: nodename nor servname provided, or not known (codeload.github.com:443)