Fatal error on random blog posts

Pretty simple. comments.php is trying to call a function twentyseventeen_get_svg() which doesn’t exist: Uncaught Error: Call to undefined function

You’ll probably need to contact the theme developer or, just find the part of the code in comments.php (line 88) that calls the function and comment it out.

Looks like that function comes with the theme twentyseventeen but yo’re not using twentyseventeen