Pingback url w3c validation error

What’s wrong with my template ?

ine 10, Column 47: Bad value HD PHOTOGRAPHER for attribute href on element link: WHITESPACE in PATH.

i’m using this in my header.php

<link rel="pingback" href="<?php bloginfo('pingback url'); ?>" />

what’s wrong ? here you can see it https://validator.w3.org/check?uri=https://enovastudio.org/wordpress-demo/hdphotographer/&charset=(detect+automatically)&doctype=Inline&group=0

If i remove the space from the website title through the dashboard there is no error -.-

(i’m using the same code on another template with multiple spaces in the website title and there is no error. )