--- SystemInvalidOperationException The LINQ expression GroupByShaperExpressionKeySelector bMerchantIdElementSelectorEntityShaperExpression EntityType Bill ValueBufferExpression Projectio

This error occurs when trying to execute a LINQ query that cannot be translated into SQL by the database provider. The query may contain unsupported operations or functions that cannot be converted to SQL syntax. To resolve this issue, you can either rewrite the query in a way that can be translated into SQL or explicitly switch to client-side evaluation by using methods such as AsEnumerable, AsAsyncEnumerable, ToList, or ToListAsync.