Hey so I just re-tired the ThomasJepp tool again to see if it's still working fine on my end so I'm not sure what's causing the error on your end. Here's the command prompt script I got:
" Microsoft Windows [Version 10.0.22621.4317]
(c) Microsoft Corporation. All rights reserved.
C:\Users\XXXX>cd "C:\Users\XXXX\Desktop\All Folder\Programs\Game Programs\Modding Programs\Saints Row IV PC Modding Tools\ThomasJepp.SaintsRow-rev121"
C:\Users\XXXX\Desktop\All Folder\Programs\Game Programs\Modding Programs\Saints Row IV PC Modding Tools\ThomasJepp.SaintsRow-rev121>ThomasJepp.SaintsRow.CustomizationItemClone "Iron Saint" Dummy Mod
Mapping mesh cm_suit_ironsaint.cmeshx -> cm_Dummy.cmeshx
Mapping mesh cf_suit_ironsaint.cmeshx -> cf_Dummy.cmeshx
Warning: original language string could not be found for Czech.
Warning: original language string could not be found for Dutch.
Finished cloning customization item Iron Saint to Dummy!
C:\Users\XXXX\Desktop\All Folder\Programs\Game Programs\Modding Programs\Saints Row IV PC Modding Tools\ThomasJepp.SaintsRow-rev121> "
