you are in an unfortunate place some how your .vdf has been corupted, but here is how I fixed this … warning it sucks.
open your mod page in the steam workshop and right click copy page url and paste to a text editor to get the PID the numbers at the end…if you don’t know it already.
In the dev kit upload dialog ‘reset publisher’
upload to steam as a hidden file
log out/ exit steam completely
open file - #:\Epic Games\ARKDevKit\ModTools\ModConfigs’modname’.vdf in a text editor and change the PID back to your original one and save the file.
go to your - #:\Epic Games\ARKDevKit\ModTools\SteamCMD\ directory and launch steamcmd.exe
type - login ‘password’ ‘login’
type - workshop_build_item #:\Epic Games\ARKDevKit\ModTools\ModConfigs’modname’.vdf
type - quit
close the window
open steam and delete the extra hidden mod
where ’ ’ is your own information and #:\Epic Games\ARKDevKit\ is your complete dev kit path including drive
you will have to follow this process with every update from now own unfortunately.