Zero idea why this is happening

[thomrg15]

okay so im editing a Niivu theme and for some reason I cannot change the taskbar... the taskbar wont even change to his theme (in my moded theme) and I can see it selected in Start is back but it seems to just go back to the default. im saving over his original file and modding some things. Now when I load up his orginal theme in WSB everything works fine and I can even edit it and change things. I would just do that but ive built so much in my own mod/theme that redoing all work is just not an option. Any ideas? im literally stumped

ive attached a pic.. im on 1809 btw

https://ibb.co/C7S9sXV