Please tell me what this means and how to fix it?

I can't upload logs

mod version: modernfix-mc1.18.2-2.1.0
forge: 1.18.2-40.2.0

No fix is required; this is just ModernFix notifying you that one of your mods uses outdated structures which slows down the launch. This warning is harmless (hence why it is a warning, and not an error).