MRTK ver 74+ 'BlockDataIds' is inaccessible due to its protection level

Hello everyone, I am trying to incorporate some Mixed Reality elements into my Unity 6 project based on Meta Interaction SDK. I tried installing the MRTK package and despite trying multiple versions, I always get the error in the console: 

Library\PackageCache\com.meta.xr.mrutilitykit\Editor\BuildingBlocks\InstantContentPlacement\Scripts\InstantContentPlacementInstallationRoutine.cs(105,79): error CS0122: 'BlockDataIds' is inaccessible due to its protection level

This is a package script and I am unable to find the BlockDataIds that it is trying to access. Blocking out the relevant method fixes the issue but I do not want to find surprises later on due to it. 

Any idea how to fix this? Currrently using Meta Interaction SDK ver 71, Meta Core SDK 74 and Meta MRUK 74.