Error building Plugin from 5.3 to 5.4

Development Pipeline & Plugins
3

in your target file for the plugin make sure you change the build order or it won’t compile

DefaultBuildSettings = BuildSettingsVersion.V5;
IncludeOrderVersion = EngineIncludeOrderVersion.Unreal5_4;

does WSpawnerBlockingVolume.h in
WorldSpawner\Public have the same file contents as the one in Misc?

If so then you need to pick one header or change one of their names and then remap the includes of files that depend on it.