This is a zip of the assign starting plots lua from the summer 2017 patch version 126.96.36.199. Unzip and copy over the file from the fall 2017 patch to fix the starting locations bug.
File path :
C:\Program Files (x86)\Steam\steamapps\common\Sid Meier's Civilization VI\Base\Assets\Maps\Utility
YnAMP users don't need to use this, it is not compatible
Assignstartingplots Lua from v. 188.8.131.52 2017-10-20
Hotfix for starting locations bug in fall 2017 patch