For the second time in a while, I got a toast that said "Baby Mobs Has Run Into a Problem." This time, it happened when I was using the /summon command. If I just type /summon, without specifying which entity I want to summon, no red text barking at me to finish the command shows up in chat, and I get that error toast.

Here's the log it provided me with:
https://paste.dimdev.org/owewegesay.mccrash