The keyboard shortcuts "Ctrl+C and Ctrl+V" do not work. I can't insert a link or anything else, it works everywhere except for your mod. Rather, the windows of your mod where you need to insert links and so on.

But that's not all, skins by nickname don't work.

@samolego

"They work for me" 😅.

Which version? Launcher?

1.19.4 https://github.com/UltimMC/Launcher

UltimMC
This is a "cracked" version of a popular Minecraft launcher that lets you play the game without a Microsoft account

I'm sorry, but I can't support cracked launchers. It's the reason for skins not working.
Not really sure what's causing the copy paste failure.