FYI... If your having an issue with your previous saves not loading with this latest v12Beta build, due to using the previous version of the 11c game mod... At this time using the out of date Scrappy 11c mod will allow old modded saves to load without the renpy white error screen (Usually out of date mods will stop at new content, but Scrappy mod will somewhat work). BUT the walk through portion for the new content will not work, but the cheats section still works (Note: Scrappy's mod will not be updated until the full version is released...he doesn't update beta game versions of his mod).
BUT remember this latest version is BETA (v12beta), DO NOT over write your past saves with this game version, as this is a beta version and is an incomplete game version. You will have to replay v12 when the full version is released, as beta saves will not work properly with the full version when released.
Scrappy's 11c mod