Incorrect name, Allowed entities list and messages configures.
I entered the name of the plugin incorrectly in plugin. yml "CarryOnAnimal" instead of "CarryOnAnimals" fixed it. Since the name of the plugin has been changed, the plugin folder will also be created differently, if you have already made some changes - create the CarryOnAnimals folder and place the old version of config.yml there, the system will update it to the new version.
Added a list of entities "allowedEntities" that player can interact with, you can change it in config.yml.
The canCarryPlayer option has been deprecated, now if you want to add the ability to move players just add a parameter to allowedEntities - 'Player'.
Added posibility to remove all messages globally - just disable option messagesEnabled in config.yml.
Added posibility to remove certain messages - just write instead of them empty string.
Added the ability to remove the prefix - just write an empty string instead.