Please try closing the solution, deleting the VisualGDBCache and CodeDB folders and then reopening it. If it doesn’t help, please try creating a new project and ensure that the problem doesn’t affect it.
Then compare the .vgdbproj/.vgdbcmake files between the old and the new project – the old project file might contain some hardcoded paths that became invalid as you have moved it to a different machine.
Deleting the cache and CodeDB folders did not help.
Created a new project based upon Blinky and then copied the code and header files across into the new project. Deleted blinky.c and then added the copied files using Add Existing Item. Still seeing the same problem.
Used the wizard to create a new Import project, still seeing heh same problem.