I can replicate the issue when I visit the URLs that you’ve shared.
The issue looks related to the PHP incompatibility with some theme or plugin on your site. It looks like you are unable to login to the WP Admin as well.
In this case, you can reach out to your hosting support to see if they can share the error log which can point you to the plugin/theme responsible. And check with them if the PHP is setup and configured correctly for the site. (Seems like you are using HostGator, you can contact their support)
Alternatively, you can make a full backup of your site via your hosting panel and then enable debug logging on to your site by following the guide https://developer.www.ads-software.com/advanced-administration/debug/debug-wordpress/#example-wp-config-php-for-debugging
Once done, you can visit the homepage and this would log the errors on the debug.log file which will be located in /wp-content/ directory. https://developer.www.ads-software.com/advanced-administration/debug/debug-wordpress/#wp_debug_log
This will help you narrow down what could be causing this issue. If you need more help understanding the error, you can share it here to get an idea as to what it could be related to.
Regards,
Saurabh