In new version 2.8.1 @Saurabh @Mani
Hamza file is not reading your logo file
look at the file, if everything is ok
Hamza Go to Admin > Settings > General
Make sure your Website URL is correctly entered.
If your website is: mydomain.com, then in the Website URL field, you should place: https://mydomain.com
Hamza try to check the format of the logo and size
Format : PNG