Hi Jean,

Regarding your issue, look like there is a missing db table column in your EasySocial. I've logged this issue into our issue tracker and the fix will be added into next release of EasySocial. I've also executed below SQL to add the missing column at your site. Now the reaction should work correctly. Please give it a try again.

ALTER TABLE `#__social_likes` ADD `uri` TEXT NOT NULL AFTER `stream_id`;

Whoever that encounter the same issue, please run the above sql statement and remember to replace #__ to your Joomla db prefix.

Hope this help and have a nice day