I made thorough requests and interaction with Stackideas Support Team so finally they arrived to the conclusion:
Regarding your issue, look like when there is a gallery block in the content, upon saving, the saving ajax request hits 403 forbidden error. Please see http://screencast.com/t/3uZ8qdDorZj I also noticed your site enabled the x-xss-protection so I not sure is this issue related to that or not.
Can you temporary disable the x-xss-protection and see if your issue still persist? If yes, then can you send me your FTP account so that I can investigate your issue further?
SO I checked and in the WAF section the XXS Shield is disabled as you can see in the first attached image.
Then went to .htacces maker and founs the setting Reflected XSS prevention setting which was set to YES. I disabled and made new .htaccess but nothing changes so I put it back to YES.
I also included
components/com_easyblog
media/com_easyblog
in all exception textareas. Nothing changed.
My main questions are:
Is there somewhere else in the Admin Tools where these XXS protection can be active?
Are you aware already of these problem with some other user?
Any suggestion?
Thank you.