Multiplayer code reads a variable that isn't set up to replicate

Why: Your code reads '{var}' on a client expecting it to match the server's value, but '{var}' isn't marked Replicated — clients only see whatever default they spawned with.

Fix: Open the Blueprint. My Blueprint panel → click '{var}' → Details panel → scroll to Replication section → set 'Replication' to 'Replicated' or 'RepNotify' (RepNotify lets you trigger a function on each replication event).