Hi,
for example the Automatic Include Path Discovery function includes
…/usr/include/c++/6 and …/usr/include/c++/6/tr1;
This caused hundreds of IntelliSense errors.
I changed it to
…/usr/include/c++/8
and now IntelliSense and build (remote and local) works.
Thank you, there is no need for forther investigation.
Just wrote this, if someone has similar problems…
Kind regards