Error: The configured working directory build for the targetset Target Set+ does not exist

Help
1

After opening folder eg.:
~/Downloads/foo

and has previously obtained a build folder:

cd ~/Downloads/foo
mkdir build

Then get into build menu, to fill :
Target set with

build

directory, and clicking target set and build icon (gear icon), it’ll pop out:

The configured working directory build for the targetset Target Set+ does not exist.

Create the directory?

It cannot ever work except by filling it as absolute path instead

How to get it work such by relative path of build directory?
Please help me out

2

You need to provide some context if you want people to help you. What program are you talking about and what are you trying to do?

3

No resort to relative path, must be absolute as strive to solve the first to no avail for 3 days long