Meaning, you can no longer just convert the tuning file to HQ and then it'll work. I asked about this very issue on their LL page and was told that it's because you now have to go into the tuning file via Sims4Studio, click on the warehouse tab and locate all of the DDS files (the textures used in WW) and convert only those to HQ.
Tedious as hell, and not worth it for me. I'm stuck on 145 since that was the last version that worked with converting the tuning file to HQ. Any version after that, caused my game to not load whenever I would convert the tuning file to HQ.
EDIT: Try giving
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a go. I'm on version 1.56, but this worked for me. I'm using the latest WW with the HQ mod installed using this workaround with no issues.