Hi,
looks like the css is all messed up, there could be template diffrrences between version 4.3.2 and current 4.3.10.
make a copy of magnum theme and then re-install it from ips marketplace. then, if you needed the colors back, use this app https://invisioncommunity.com/files/file/10067-dark-mode/ with this app you can import/export colors.