Entity Framework Extended - simple delete is giving me null reference

I've grabbed the Entity Framework Extended source code from nuget and I want to use it's delete expression to delete multiple rows of data using ID.

In my code I use PersonID to get ClaimsID. In two tables ClaimsID is an FK and the last table I delete from it is PK. I am doing it in this order because of key constraint.

For some reason it is giving me a null reference:

public void DeleteClaims(string _PersonID)
        {
            Guid PersonID = Guid.Parse(_PersonID);
            try
            {
                using (CasaLatinaEntities CasaLatinaEntities = new CasaLatinaEntities())
                {
                    //Delete all FKs first before deleting parent data 
                    var tblClaims = CasaLatinaEntities.tblClaims.Where(c => c.PersonID == PersonID);
                    List<Guid> IDs = tblClaims.Select(c => c.ClaimID).ToList();

                    foreach (var ID in IDs)
                    {
                        var ClaimAction = from c in CasaLatinaEntities.tblClaimActions
                                          where c.ClaimID == ID
                                          select c;

                        var ClaimTypes = from c in CasaLatinaEntities.tblClaimTypes
                                         where c.ClaimID == ID
                                         select c;


                        if (ClaimAction.Count() > 0)
                        {
                            CasaLatinaEntities.tblClaimActions.Delete(c => c.ClaimID == ID);
                            CasaLatinaEntities.tblClaimTypes.Delete(c => c.ClaimID == ID);
                            CasaLatinaEntities.tblClaims.Delete(c => c.ClaimID == ID);
                        }
                        else if (ClaimTypes.Count() > 0)
                        {
                            CasaLatinaEntities.tblClaimTypes.Delete(c => c.ClaimID == ID);
                            CasaLatinaEntities.tblClaims.Delete(c => c.ClaimID == ID);
                        }
                        else
                        {
                            CasaLatinaEntities.tblClaims.Delete(c => c.ClaimID == ID);
                        }
                    }

                    //CasaLatinaEntities.tblClaimActions.Delete(c => c.ClaimID == ClaimId);
                    //CasaLatinaEntities.tblClaimTypes.Delete(c => c.ClaimID == ClaimId);
                    //CasaLatinaEntities.tblClaims.Delete(c => c.ClaimID == ClaimId);
                }
            }
            catch (Exception ex)
            {

            }

        }

Code breaks at this line

CasaLatinaEntities.tblClaimActions.Delete(c => c.ClaimID == ClaimId);

I tried annotating this code out but it breaks at every delete attempt.

Stack trace

   at EntityFramework.Mapping.ReflectionMappingProvider.SetProperties(EntityMap entityMap, Object mappingFragmentProxy)
   at CallSite.Target(Closure , CallSite , Type , EntityMap , Object )
   at System.Dynamic.UpdateDelegates.UpdateAndExecuteVoid3[T0,T1,T2](CallSite site, T0 arg0, T1 arg1, T2 arg2)
   at EntityFramework.Mapping.ReflectionMappingProvider.CreateEntityMap[TEntity](ObjectQuery query)
   at EntityFramework.Mapping.ReflectionMappingProvider.GetEntityMap[TEntity](ObjectQuery query)
   at EntityFramework.Mapping.MappingResolver.GetEntityMap[TEntity](ObjectQuery query)
   at EntityFramework.Extensions.BatchExtensions.Delete[TEntity](IQueryable`1 source)
   at EntityFramework.Extensions.BatchExtensions.Delete[TEntity](IQueryable`1 source, Expression`1 filterExpression)
   at DataLayer.RepositoryClient.DeleteClaims(String _PersonID) in c:\Users\nickgowdy\Documents\Visual Studio 2012\Projects\CasaLatina\DataLayer\RepositoryClient.cs:line 876

It's not alot of code so I don't understand what the null reference is for. The rows of data exist in all three tables.

The latest Entity Framework Extended is written for Entity Framework version 6.0. You are trying to use it for Entity Framework 6.1, which came out a few days ago and is not supported yet.

Try using Remove()/RemoveRange() for now, until they make a fixed version of EF:Extended.