Error with the spawn command

Hello,

When I do the command to spawn the mob "bite" (/mm mobs spawn bite) I have this error in my console :
https://hastebin.com/gumonowogo.md

Here is the loading of the plugin with debug level 2 :
https://hastebin.com/noyimudamu.vbs

It looks like there is problem with the Disguises support, but I checked, and I even reupdated the libdisguises plugin, I have the 173 build (of 7 october), idk why it doesn't works