Having issues with ATM10 using Neoforge. Seems like it's clashing with an existing mod? It just crashes anytime I load up the game. Removing controllable stops the crashing. Can provide logs if you need but it seems like I may not be the only one with this issue.

It's Iron Jetpacks, if not using the mod, remove it until they update compat. I have reported that issue on their repo: BlakeBr0/IronJetpacks#114

Iron Jetpacks has now patched their mod. Update it to avoid the crash.