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.