PuTTY: "unable to load font" in Ubuntu 20.04

I have installed PuTTY on Ubuntu 20.04 LTS . When I enter the IP address and click on the Open button, Putty gets closed automatically.

The error message is:

PuTTY: unable to load font "server:fixed

Solution 1:

I got the same problem today. So I tried to change the font, which you can see on left middle side of PuTTY. Go to Fonts and change it for Font use for ordinary text; set it according to your choice. I set it to UBUNTU MONO. It worked.

Solution 2:

This problem is caused because of font default setting. From the Left menu: Categor --> window --> Fonts --> Fonts Used for ordinary text. change the default font from server:fixed to your desired font family. but this is not permanent. you can fix this problem permanently by editing the file in this path: ~/.putty/sessions/Default%20Settings

change The "FontName" value to your desired font. this should solve the problem