Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware[1]
An unhandled exception has occurred while executing the request.
System.ArgumentNullException: Value cannot be null. (Parameter 'inner')
at System.Linq.Queryable.Join[TOuter,TInner,TKey,TResult](IQueryable1 outer, IEnumerable1 inner, Expression1 outerKeySelector, Expression1 innerKeySelector, Expression`1 resultSelector)
at
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware[1] An unhandled exception has occurred while executing the request. System.ArgumentNullException: Value cannot be null. (Parameter 'inner') at System.Linq.Queryable.Join[TOuter,TInner,TKey,TResult](IQueryable
1 outer, IEnumerable1 inner, Expression1 outerKeySelector, Expression1 innerKeySelector, Expression`1 resultSelector) at