Resuming training is broken, and the default dtype won't even let me construct a config

Resuming training is broken, and the default dtype won't even let me construct a config: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). I'm trying to spin up an SAE training run with SAELens for the first time and ran into two issues that look like bugs.