Issue [FIXED] Multiple Spouses Mod, Game stuck after wife gives birth

[aBean]

" [game] An error occurred in the base update loop: NullReferenceException: Object reference not set to an instance of an object.
at MultipleSpouses.Pregnancy.BirthingEvent_tickUpdate_Prefix(GameTime time, BirthingEvent __instance, Boolean& __result, Int32& ___timer, String ___soundName, Boolean& ___playedSound, String ___message, Boolean& ___naming, Boolean ___getBabyName, Boolean ___isMale, String ___babyName) in C:\Users\poiqwe\source\repos\StardewValleyMods\MultipleSpouses\Pregnancy.cs:line 134
at StardewValley.Events.BirthingEvent.tickUpdate_PatchedBy<aedenthorn.MultipleSpouses>(BirthingEvent this, GameTime time)
at StardewValley.Game1._update(GameTime gameTime)
at StardewValley.Game1.Update(GameTime gameTime)
at StardewModdingAPI.Framework.SCore.OnPlayerInstanceUpdating(SGame instance, GameTime gameTime, Action runUpdate) in SMAPI\Framework\SCore.cs:line 1026 "

I have 3 Wifes on my farm (I'm playing as a Female), one of which is a Co-Op player. Somehow, Emily, who is one of the wives, gave birth. After this event, the game threw the error shown above and got stuck on the "(Waiting for other players... 1/2) screen.

EDIT:

It fixed itself after restarting the world without Co-Op enabled.