hi,
just installed CComments Core on joomla 2.5.9
I have it excluded from all categories wanting to specify single articles to use the plugin.
I added it to one of my articles with the tag: {ccomment on}
Which is working. The comment area appears on the article and can be interacted with.
however when you press 'Save' the button changes to 'Saving...' and just gets stuck there.
EDIT: google dev tools say 404 not found:
mydomain.com/?option=com_comment&task=comment.insert&format=json&c293acfc008dc9af9ed2a1c6d47f38d5=1