Hi Lynn,
After investigating a long check, the reason why you encounter this issue is that your site was forced to load the domain with WWW prefix but you hardcoded this domain "
https://checkyourbaggage.net" (without WWW prefix) in your configuration.php file so caused the ajax URL request to
https://checkyourbaggage.net/?option=com_easydiscuss&view=post&layout=reply&format=ajax&tmpl=component&ba53e5683c8764897b3cf27de0cdc89f=1 without WWW prefix so it redirects to this ajax request URL with WWW prefix
https://www.checkyourbaggage.net/?option=com_easydiscuss&view=post&layout=reply&format=ajax&tmpl=component&ba53e5683c8764897b3cf27de0cdc89f=1 then the reply process failure.
To fix this, I've helped you remove this hardcoded domain (without WWW prefix) from your configuration.php file, it should work fine now, can you give it a check?
Original code:
public $live_site = 'https://checkyourbaggage.net';
Replace with:
public $live_site = '';