The UIO mod builds it's list of "User Interface" changes when it loads the game. The "magenta" faces is a texture problem. The combination happening at once suggests to me you might be having a hard drive problem. It never hurts to run "chkdsk" and an anti-virus scan.
"User Interface (UI)" problems indicate you have changed XML files. This is often caused by an "install order" problem with more than one mod replacing or editing the same XML file. Please see the wiki "HUD-UI-Menu issues" article. (This takes some interpretation as applies to your situation. There are too many permutations for an "if A then B" type of guide. If you haven't encountered XML files before then the "TL;DR" section is not going to help by itself.)
"Disabling" mods is not enough to restore things to "vanilla" if they overwrote any files. UI mods definitely do this, and can make "edits" to other existing XML files. You have to "verify local files" to restore the originals, and still may need to delete the "loose files" so those vanilla versions get used from the BSA files. Then correct the sequence in which you install those UI affecting mods. Please see the 'Restoring to "Vanilla"' entry of the wiki "FNV General Mod Use Advice" article.
In general, if you haven't changed anything about your game and it suddenly stops working correctly you need to look to other causes: such as software updates to Windows, programming libraries such as ".Net", or hardware drivers. Older games eventually get dropped from product testing.
FYI: If you recently had a Windows system update, you only have 10 days to revert to the previous version if you decide to choose that option.