This is not a Fabric API bug per se, it can happen in vanilla with a special dimension datapack, but with the introduction of EntitySleepEvents.ALLOW_SLEEPING this can occur several times.

It can be replicated with:

EntitySleepEvents.ALLOW_SLEEPING.register((player, pos) -> PlayerEntity.SleepFailureReason.OTHER_PROBLEM);

then clicking a bed block at night in the Overworld.

Log (Warn: Mojang Official Mappings): https://gist.github.com/alkyaly/5c6207833bb8315340d158643349b7ca

BedBlock#onUse never null checks for a SFR text, passing null to PlayerEntity#sendMessage.
This could be easily solved with a injection inside the onUse lambda:
(Warn: Mojang Official Mappings): https://github.com/alkyaly/Somnia-Fabric/blob/1.17-Fabric/src/main/java/io/github/alkyaly/somnia/mixin/BedBlockMixin.java#L29-L35

Having the mixin in Fabric API would avoid duplicated code within mods that depend on that event.

Vanilla issue for this is MC-235035.

Vanilla issue for this is MC-235035.

Thanks, I added that to the fix comment in #1681.