Intellisense not showing for lib_extra_dirs

I still experimenting with different linking options of my libraries in order to get the suggestions working outside the project folder. Since using lib_deps and adding every library manually I have no building errors. Suggestions and marking the variables “blue” are still not working.

Trying to directly linking the libraries using

symlink:://D:/GClib/atom/libaries/Core

results in

Resolving nanoatmega328 dependencies...
Library Manager: Installing symlink:://D:/GClib/atom/libaries/Core
VCSBaseException: VCS: Unknown repository type symlink:://D:/GClib/atom/libaries/Core

Do I have to deactivate installing libraries via the library manager?

It seems to work fine localy according to this issue, but I am unable to get it working.