Place the hypelist at the very bottom of the plug-in list.

I guess you found the error log then.

You might want to check out the file /home/vieniese/public_html/mod/elgg_hybridauth/languages/it.php. There's some problem in this file in line 1, possibly an empty line, which is not allowed before <?php. After fixing the error in this file flush the site caches.

As for the other error: PHP Fatal error:  Call to undefined function elgg_generate_action_url() in /home/vieniese/public_html/mod/hypeDropzone/views/default/input/dropzone.php on line 68. My guess is that you are using a too new version of hypeDropzone here that has already been released for the (still unreleased) Elgg 3.0 and this version very likely doesn't work on Elgg 2.x (see the compatible Elgg version(s) listed on the release page on github). Re-install the latest version compatible with Elgg 2.x: https://github.com/hypeJunction/hypeDropzone/releases/download/5.0.1/hypeDropzone-5.0.1.zip. Maybe you also have too new versions of some other hype* plugins installed if you recently upgraded them. There are no errors about any other plugins listed in the snippet of the log you posted but best make sure there's no problem.

If the problem still persists, check for entries made in the log at the time the ajax error message appears.

thanks a lot! It works for sure with Hype Interactions ! Now works really fine! !! 

I have re-activated HypeFeed and HypeDiscussions and works all fine! 

thank you very much !!!!