The job was canceled because "ubuntu-20_04_DevEx" failed.

'PlaygroundApplicationBuilderExtensions.UseGraphQLPlayground(IApplicationBuilder, string, PlaygroundOptions?)' is obsolete: 'GraphQL Playground has not been updated since 2019. Please use GraphiQL instead.'

The operation was canceled.

A FrameworkReference for 'Microsoft.AspNetCore.App' was included in the project. This is implicitly referenced by the .NET SDK and you do not typically need to reference it from your project. For more information, see https://aka.ms/sdkimplicitrefs

Nullability of reference types in type of parameter 'x' of 'int TxComparer.Compare(Transaction x, Transaction y)' doesn't match implicitly implemented member 'int IComparer<Transaction>.Compare(Transaction? x, Transaction? y)' (possibly because of nullability attributes).

Nullability of reference types in type of parameter 'y' of 'int TxComparer.Compare(Transaction x, Transaction y)' doesn't match implicitly implemented member 'int IComparer<Transaction>.Compare(Transaction? x, Transaction? y)' (possibly because of nullability attributes).

Possible null reference return.

Converting null literal or possible null value to non-nullable type.

Possible null reference return.

Converting null literal or possible null value to non-nullable type.

Cannot convert null literal to non-nullable reference type.

Possible null reference argument for parameter 'item' in 'bool SortedSet<Transaction>.Remove(Transaction item)'.

Cannot convert null literal to non-nullable reference type.