./Hello

Some Unicode characters in my system are not displaying rather it appears in a rectangle box with digits in it. I hadn't noticed this error before, I tried to configure neovim and installed airlines that was the first time I encountered this error and later I noticed several of them in my browser, sometime in my alert notification. The problem is I don't know how to solve this, I tried some things but, didn't work out. Please help me out guys !!. I included some screenshots to this post down below.

Pic-1

Pic-2

Pic-3

```
for clarification :

OS : Arch linux x86_64
DE : xfce
font : Dejavu sans book ( for system ) and dejavu sans mono book (for terminal)

```

Thank you in advance