BatchUpdate no longer working with EFCore 2.1 Preview
EF Core merged a PR in December that broke Batch Update in EntityFramework-Plus. Here is the commit in question.
Looking at the code it appears as though this is the offending line

The NodeTypeProvider was refactored out to the QueryProcessor, so another call will be required to reference it.
Thanks!
Hello @hhorton2 ,
Thank you for letting us know.
We will look at it,
Best Regards,
Jonathan
Hello @hhorton2 ,
We looking at it and made a fix according to this PR but it looks the code has already changed a lot and the IQueryProcessor has already been removed from the latest preview build.
We have chosen to not anymore support preview release but only stable release.
Feel free to hit us again with this request when the stable will be released.
Best Regards,
Jonathan
That sounds reasonable! Just thought I would give you a heads up. 2.1 will most likely be in preview for another couple months though. Thanks for looking into it.