Install SVG Support plugin
Download from: https://wordpress.org/plugins/svg-support/
or if using Composer:
composer req "wpackagist-plugin/svg-support":"*"
For each SVG to be uploaded, make sure the xml declaration is at the beginning of the SVG
Open SVG with text editor
Add the beginning, add the following:
<?xml version="1.0" encoding="utf-8"?>