Hi,

>>opened KDE system settings then selected configure and 'Tree View'
Then clicked on 'Desktop Effects'
characters are unreadable/crash/missing under 'Desktop effects menu list'
same behaviour with 'Sidebar view' and 'Icon view'
OS: buster
let me know if you need any other information. Any idea how to solve this?

Thanks,
Arun

A bit more information about your exact Plasma version might be helpful here, as well as which Global theme you are using.

FWIW: most issues with missing or badly displayed icons are appearing with 3rd-party global themes which need to be addressed to the author.

Plasma 5.14.5 and using Breeze theme

Thanks,
Arun

Buster doesn't exactly ship a recent Plasma and System Settings has changed quite a bit since that time, did you try using larger fonts?
You might provide a screenshot to illustrate the problem (use a direct image upload like imgur for that).

yes I have tried with larger fonts, didn't help

Attached image here,
https://imgur.com/a/Vwx5fTX

Thanks,
Arun

woah, that looks bad, what font do you use?

FWIW: since Plasma 5.14 is no longer supported on our side, you need to report this to Debian

using 'DejaVu Sans' font and font size '12'.

Thanks,
Arun

Did you try another font, like Noto for example?

tried with other fonts also, same issue.

Thanks,
Arun

Did you report this to Debian? Because with your Plasma version there is really not much we can do about