The "fix 55" often refers to the update released alongside the Minecraft 1.21.5 series. If your pack isn't working on the latest 1.21 update:
: Mobs like Villagers now have eye-tracking, and Iron Golems create dust clouds when they walk. The "fix 55" often refers to the update
: Search for " Actions & Stuff " in the search bar. The "fix 55" often refers to the update
: Click the Gear Icon on the active pack to choose your experience: The "fix 55" often refers to the update
: If you already own the pack, the Marketplace button will say "Update" instead of "Download".