I think I can add something to this solution.
As far as I understand, the problem also comes from the Game_Gather.ini file in your project
YourProject/Config/Localization
Yes, first of all, there are paths to the .manifest files that do not exist and @DryreL solution helps (also disabling LiveCoding)
But there was one more problem for me - folder name. If you name folder with StringTables “Localization“ it will be ignored. Even you don`t see exclude path “Content/Localization/*“ in localization dashboard. Check Game_Gather.ini file → you will be surprised)))
So, my addition to this solution is → do not create folder named “Localization”. I don`t understand why editor allows you to do it.
After moving files to new folder it gathers with no problems.
I hope this helps someone.