Variable references a deleted or renamed type

Why: The variable '{name}' is typed as something that no longer exists in your project. This happens when you delete or rename a Blueprint, Struct, or Class that other variables referenced — UE5 leaves the reference dangling. Fix: Open the Blueprint that owns '{name}' (in the Errors panel, click the file link). In My Blueprint panel, click '{name}' to select. In Details panel, change Variable Type to a valid type, or delete the variable entirely and remove all references.

Enhanced Input Action asset is missing

Why: A node references the InputAction '{ia}' which was deleted, renamed, or never created. The compiler can't bind to it. Fix: In Content Browser, search for '{ia}'. If found: re-link the node by dropping it on the workspace + replacing the broken reference. If missing: create the InputAction (Content Browser → right-click → Input → Input Action), then add it to your InputMappingContext.

SetActorLabel — change the actor's display name in the editor

Format Text — format text with named arguments

K2Node_FormatText. Use {ArgName} placeholders in format string. Adds input pins per argument automatically.

OpenLevel — load a new level by name

bAbsolute=true reloads from scratch. LevelName is the map asset name without path.

Replace string — replace occurrences in string

String ToUpper — convert string to uppercase

Name

A case-insensitive immutable string ID. Fast comparisons; used for tags, slot names, asset references.

SetCollisionProfileName — set collision profile by name

Common profiles: BlockAll, OverlapAll, BlockAllDynamic, OverlapAllDynamic, Pawn, NoCollision, Custom.

String ToLower — convert string to lowercase