Little icons problem with LL 7.6

[LostSoul]

Hi everyone, I'm having a little problem with Linux Lite 7.6. The Adwaita icons and others in the Control Panel have annoying missing parts. The only ones that work are Papirus and ePapirus. Comparing 6.6 (image 1) which has no problems, 7.6 (image 2) is incomplete. Even worse are the Humanity icons in 7.6 (image 3). I tried copying the corresponding icons in /usr/share/icons from 6.6 to 7.6 without success. The .svg files aren't detected, obviously I'm not capable. Any ideas? Thanks in advance.
           

[stevef]

Try this.
Close Control Panel if open
Open a terminal by pressing 'Ctrl' 'Alt' and 'T' together
Enter these commands along with your password if asked.

Code:

sudo mkdir /usr/share/icons/Adwaita/48x48/

Code:

sudo mkdir /usr/share/icons/Adwaita/48x48/apps

Code:

sudo cp /usr/share/icons/Papirus/48x48/apps/lite*.png /usr/share/icons/Adwaita/48x48/apps

Open Control Panel - see if the 'lite' branded apps now have icons.