Minor problems adding ChatGPT to Minecraft. helpmepls:c

I am developing a mod based on an entity, and the player must dialogue with it via chat using an ai. To do this, I created files ChatHandler.java and OpenAIClient.java:

this is ChatHandler.java code:

https://pastebin.com/LNUSk4wd

this is OpenAIClient.java code:

https://pastebin.com/35Th09Cq

In addition, I created a libs folder in the root folder of the mod (C:\Users\User\MCreatorWorkspaces\myfriendmava\libs) and loaded the libraries:

okhttp-4.9.1.jar
okio-2.9.0.jar
gson-2.8.8.jar
there. In the root folder there is a 
build.gradle file,  the code there is:
https://pastebin.com/MnfibMX9

The error is that Minecraft starts, but a menu is displayed with the error:

How can I fix this? I tried a lot and couldn't solve the problem. I would be glad for any help. Minecraft 1.20.1. Forge 47.2.0.
crash: https://pastebin.com/VWhWk3DJ