It is as per the restrictions - always has been
vassalengine.org/wiki/Module … strictions
Contact the copyright holder
Specifically in this case for most of the SPI titles, that would be Decision Games,. If they say ok, go ahead and note it was allowed in the comments for us so we don’t remove it, or better yet have DG drop us a note that they have changed their position w/r/t vassal hosting their SPI titles. That way we will gladly change our restrictions.
Our last direct contact with them told us we were not allowed to host SPI titles they hold copyright over and we have heard nothing from them directly since then that they have changed their position on SPI titles.