Clear the cache and check back. If the problem continues then please provide with admin panel login details and URL of the website to check it myself and help you out accordingly.
I inspected your site and it showed CORS policy errors in the console. It seems to be a problem with your server configuration and any fonts resources can’t be loaded.
Because the Access-Control-Allow-Origin is disabled. Try to contact your hosting provider for help in this issue because it has been controlled by the hosting company.