ThonkUtil's 2.15.5 update causes crash on startup due to an incompatibility with AkashiiKun's More Axolotl Variants API.
Possibly related to pull #36 or commit 8e5ff7e? (take w/ several grains of salt, likely to be outright wrong)

Logs included:
All related mods enabled
ThonkUtil + AkashiiKun's API, no content addons
(Functional) Only ThonkUtils enabled
(Functional) Only AkashiiKun's API + relevant addon