Android building failing within a few seconds

I changed both and it now has come to a new error

“MainFrameActions: Packaging (Android (All)): UnrealBuildTool: fatal error: UTF-16 (LE) byte order mark detected in ‘C:/Users//Documents/Unreal Projects/HangMan/Source/HangMan/EmptyClass.cpp’, but encoding is not supported
MainFrameActions: Packaging (Android (All)): UnrealBuildTool: fatal error: UTF-16 (LE) byte order mark detected in ‘C:/Users//Documents/Unreal Projects/HangMan/Source/HangMan/MyClass.cpp’, but encoding is not supported”

Should these be UTF 8 too ?