I don't know if you've actually gone into the files, but PPE actually replaces some companion portraits with the exact same portrait (Xzar is in there for example). Don't know why, but it does (I'm sure someone more knowledgeable about coding can explain why). When you install the mod, the portrait for Xan disappears and is replaced by the standard question mark image.
You probably never noticed an issue because you used Picture Standard for companions.
Xan's missing portrait is apparently fixed by placing a copy of his portrait in the mod's portrait folder and labeling it XAN.bmp.
I recall reading somewhere (here or somewhere else) that there was at least one other portrait that was missing, but I don't know who that portrait is for (or if Xan is actually the only missing one).
Suggested by Durandalis
I don't know if you've actually gone into the files, but PPE actually replaces some companion portraits with the exact same portrait (Xzar is in there for example). Don't know why, but it does (I'm sure someone more knowledgeable about coding can explain why). When you install the mod, the portrait for Xan disappears and is replaced by the standard question mark image.
You probably never noticed an issue because you used Picture Standard for companions.
Xan's missing portrait is apparently fixed by placing a copy of his portrait in the mod's portrait folder and labeling it XAN.bmp.
I recall reading somewhere (here or somewhere else) that there was at least one other portrait that was missing, but I don't know who that portrait is for (or if Xan is actually the only missing one). Suggested by Durandalis