Hewo. I've just opened an issue over at HardModeTweaks regarding a crash that is probably of my own doing.

Hardmode Tweaks recently updated with a feature that prevents sleep in a bed for three days after the bed has been placed.

I was using my JAS SLEEP event

[
  {
    "trigger": "SLEEP",
    "expression": "if(sleepResultOk()&&obj.origin>100&&time.timeOfDay<14000){ spawn('Zombie').offset(5).alsoSpawn('shadowmobs.phantom',0,5,0) }"
  }
]

I was within 100 blocks of original spawn. Time was after 9pm but I'm uncertain if sleepResultOk was true. Monsters may have been in range. I was essentially just clicking on the bed to test the new feature, as I'd only just placed it.
Chat returned "[17:26:33] [Client thread/INFO]: [CHAT] This bed was recently placed", then a few seconds later.. crash. Log.

Could you recommend some steps I can take to get these 2 features working well together? Or at least to work out the exact cause?

Closing as this seems to have been resolved on their end.

Ah thank you. I should've closed it myself. Indeed it's working well.