I was trying to use the v2.1.3+mod jar in conjunction with the Better Days 3.3.4.5 (Fabric) by wendal911.
I disabled the sleep related features in Better Days, adjusted day and night length parameters by MINUTES, then sent the following commands to the server console:
/gamerule doDaylightCycle true /gamerule playersSleepingPercentage 100 /scoreboard players set &amount_to_sleep sleep.config 2 /scoreboard players set &time_control sleep.config 0
Then checked to make sure I saw sleep.config after sending;
/scoreboard objectives list
When a player lays in bed, it notifies other players etc. all the features of Sleep are working except for skipping to morning based on the amount of players sleeping (2)