Copying this issue over to cpptools where it would need to be addressed.

Originally posted by @sslupsky in microsoft/vscode-cmake-tools#1120 (comment)

One observation is that the error message that indicates an error with the configuration would benefit with additional information about what exactly it is referring to. Here is a screen shot:

What is not clear is which configuration it is referring to. Does the message refer to the configuration in the .code-workspace file or one of the configurations in the c_cpp_properties.json file?

I copied a project directory and renamed it. I have opened the copy and I get the message in the screen shot above. I'm trying to run down where the problem is and it is not obvious.