Here's the log: https://pastebin.com/eLt51r71

Hey there. I'm Happensmaker and I think I found a minor "bug" regarding the generation of frosty blossom trees.

Basicly: They just don't generate.

As far as it was described, they spawn in "cold" biomes. Interpretation: Taiga, Snowy Taiga and even Ice Spikes.
I generated a few new Singleplayer worlds in Creative mode and searched around in the above mentioned biomes but never once a Frosty Blossom Tree generated. But all the other variants, Red, Orange, Yellow, Pink and Lavender did generate in the respective biomes.
Also on our Server we play on, I also never found one.

I have to add that we use a modpack with 70+ mods, but since the other 5 variants do generate, I don't think they cause any problems.
I also asked in your discord server around if anyone can find them. After someone (I don't know if I'm allowed to call names) checked it directly with just the quark mod (and the additional needed files), they could confirm that the frosty Blossom trees did not generate after some searching.

If you need any more Information just ask me.

Greetings
Happensmaker