Pretty much the problem is I can’t change my profile picture in System Settings, like the topic title says.
I recently performed a fresh offline reinstall using the Titan Live Environment for security reasons, I do not recall having this issue prior.
Curiously, creating a .face file does cause the icon to update in System Settings, but it doesn’t affect other places such as the login screen or start menu.
[nomiddleclass@nomiddleclass-b650mcv3y1 ~]$ fastfetch
./o. nomiddleclass@nomiddleclass-b650mcv3y1
./sssso- --------------------------------------
`:osssssss+- OS: EndeavourOS x86_64
`:+sssssssssso/. Host: B650M C V3-Y1 (Default string-CF)
`-/ossssssssssssso/. Kernel: Linux 7.0.14-arch1-1
`-/+sssssssssssssssso+:` Uptime: 1 hour, 7 mins
`-:/+sssssssssssssssssso+/. Packages: 1286 (pacman)
`.://osssssssssssssssssssso++- Shell: bash 5.3.15
.://+ssssssssssssssssssssssso++: Display (ASUS VP278): 1920x1080 in 27", 75 Hz [External]
.:///ossssssssssssssssssssssssso++: DE: KDE Plasma 6.7.2
`:////ssssssssssssssssssssssssssso+++. WM: KWin (Wayland)
`-////+ssssssssssssssssssssssssssso++++- WM Theme: WhiteSur-dark
`..-+oosssssssssssssssssssssssso+++++/` Theme: WhiteSurDark (WhiteSurDark) [Qt], Breeze-Dark [GTK2], Breeze [GTK3]
./++++++++++++++++++++++++++++++/:. Icons: breeze-dark [Qt], breeze-dark [GTK2/3/4]
`:::::::::::::::::::::::::------`` Font: Noto Sans (10pt) [Qt], Noto Sans (10pt) [GTK2/3/4]
Cursor: WhiteSur (24px)
Terminal: konsole 26.4.2
CPU: AMD Ryzen 7 7800X3D (16) @ 5.05 GHz
GPU: AMD Radeon RX 9070 XT [Discrete]
Memory:
Swap: Disabled
Disk (/):
Local IP
Locale: en_US.UTF-8
Any suggestions?

