Unity Upgrade & SDK Error Fix

I’m moving an existing Unity project up to the latest LTS release and the console is now lighting up with compilation errors tied to an outdated SDK. The culprit is a “fragment” SDK that our user-interface elements rely on; anything that touches those UI fragments refuses to compile.

Here’s what I need from you: get the project running in the newest Unity version, bring that fragment SDK (and any other hidden dependencies) up to date, and hand the game back completely error-free.

Deliverables
• Project opened in the current Unity LTS with zero compilation errors
• Updated or replaced fragment SDK plus any secondary outdated packages
• Clean builds: Android (AAB/APK) and iOS (IPA or Xcode workspace)

Acceptance criteria
• No red or yellow console messages on load or build
• Gameplay and UI fragments behave exactly as they did before the upgrade
• Both platform builds install and run without crashes

I have attached screenshot of error message