The realtracks are really physically absent but supposed to be included in the 2019 pack as part of the styles that were provided.
Nothing to fix and rebuild as it has no effect obviously.
It's clear to me that we got some RT's missing from the advertised 202 realtracks added with the 2019 version.
The solution is to provide the realtracks, 6 or something like that with the names/number, and all is well. The styles that were provided will then work as it should be for all 2019 purchasers without being pushed to get realtracks outside their upgrade purchase.