Hi,
It seems that some stylesheet/asset files are missing from the site pages. Usually the cause is a missing wp_head() or a wp_footer() call from the theme header or footer files, or possibly a misconfiguration with the site URL, or perhaps a malformed .htaccess rule. You can see the issue on the missing icons on the front-end as well: https://i.imgur.com/bpZ8XVj.png
I have enabled the conditional CSS loader under the search compatibility settings submenu, that bypasses this problem: https://i.imgur.com/JnkvzI2.png
I still recommend investigating the problem. It is probably only a minor misconfiguration somewhere.