We are very happy to introduce Mellon 2.0, our internal tool to manage external partner access! https://mellon.esa.int. Read the announcement: https://devspace.esa.int/blog/mellon2 (ESA internal-only)
I noticed in the recent versions of Space Creator that there is again an issue with the state of the system when trying to build. If I open a system, do not modify anything and try to build, it will always open this popup: