HI
the problem is happening another time
I want to change my logo and it is not appearing please check it for me and tell me how to fix this problem all myself the next time.
You need to open your SVG icons file with some editor like Sublime Text or default system text editor and add width=”31″ height=”40″ attributes to your <svg>tag like it is shown: http://prntscr.com/m4n0qw
Then you will need to re-upload your icons in WordPress Dashboard.