Looking at the error message, it seems as if you have instructed XCode to put the sysbuild/ directory directly inside your Users/ directory. I always lose count with paths including lots of ‘..’, but /Users/olivierbaudry/PeRColate_source/absmax~/../../../ (etc.) looks to be someplace where you may not have write permission.
You can either put create a new folder somewhere in your user path and move the project folder in there (so the new path to the sysbuild/ directory can be created) or edit the Target settings so that the sysbuild directory is somewhere that you can write to.
XCode’s error messages often suffer from information overload, but she *is* trying to tell you what the problem is.