Navigationspfeil (Symbole)

Hallo Forengemeinde,

was muss ich ändern, damit ich bei der zweiten Website auch die Navigationspfeile richtig angezeigt bekomme?

Beide Webseiten laufen beim gleichen Hoster. Beide Seiten nutzen WordPress 5.2.2, verwenden das Theme Simple Wordpress Theme und PHP Version 7.2.

Wordpress Plugins PCSHG: Add From Server, Advanced Database Cleaner, Buttons With Style, cforms2, Contact Form 7, Count Per Day,Customify, Duplicator, Easy WP SMTP, FrontPage Title Meta Description, Gwolle Guestbook, Insert Headers and Footers, MaxButtons, Multiple Domain, Newsletter2Go, NinjaScanner, PDF Embedder, Post Expirator, Really Simple CAPTCHA, Really Simple CAPTCHA for cformsII, Really Simple SSL, Regenerate Thumbnails, Remove Admin Bar, Robo Gallery, Robo Gallery Key, SAR One Click, Security Showeblogin Like Share Box Plugin, Simple Custom CSS, Simple Custom CSS and JS, Simple Download Monitor, TablePress, TinyMCE Advanced, UpdraftPlus - Backup/Restore, WP Google Maps, WP Mail Smtp Mailer, WP Super Edit, WP User Avatar, WP-Optimize - Clean, Compress, Cache, wpSLEEP, YellowPencil

Wordpress Plugins SBO:
Ad Inserter, Add From Server, AddFunc WYSIWYG Helper, Advanced Custom Fields, Font Awesome, cforms2, Classic Editor, Classic Editor Addon, Contact Form 7, Count Per Day, Duplicator, Fonts Gallery Manager Lite, Health Check & Troubleshooting, Import Social Events, Insert Headers and Footers, Jetpack von WordPress.com, Medien-Assistent, Multiple Domain, NextScripts: Social Networks Auto-Poster, Post Expirator, Responsive Photo Gallery, Simple Calendar, Simple Custom CSS and JS, TablePress, TinyMCE Advanced, UpdraftPlus – Sichern/Wiederherstellen, WP Edit,WP Super Edit, WP-Optimize - Clean, Compress, Cache YellowPencil

Über Eure Denkanstöße und Hilfe wärew ich dankbar