Here it is
Build started…
1>------ Build started: Project: UE4, Configuration: Development_Editor x64 ------
1>Building UE4Editor and ShaderCompileWorker…
1>Using Visual Studio 2019 14.29.30147 toolchain (C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.29.30133) and Windows 10.0.18362.0 SDK (C:\Program Files (x86)\Windows Kits\10).
1>Building 4 actions with 12 processes…
1> [1/4] Module.BehaviorTreeEditor.cpp
1>D:\UnrealEngine-4.27-plus\Engine\Source\Editor\GraphEditor\Public\SCommentBubbleUpdated.h(15): error C2144: syntax error: ‘SMultiLineEditableTextBox’ should be preceded by ‘;’
1>D:\UnrealEngine-4.27-plus\Engine\Source\Editor\GraphEditor\Public\SCommentBubbleUpdated.h(15): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Microsoft\VC\v160\Microsoft.MakeFile.Targets(45,5): error MSB3073: The command “…..\Build\BatchFiles\Build.bat -Target=“UE4Editor Win64 Development” -Target=“ShaderCompileWorker Win64 Development -Quiet” -WaitMutex -FromMsBuild” exited with code 6.
1>Done building project “UE4.vcxproj” – FAILED.
========== Build: 0 succeeded, 1 failed, 2 up-to-date, 0 skipped ==========
I created a new file named SCommentBubbleUpdated with the same implementation as the old one, just in case it was related to this but no luck. Also updated includes. Still same exact error.