Hello, I have an issue to access K2 items or category in administrator panel (screenshot attached), if I open the Information tab I can access good, I read a lot of topics and I think its an issue by the upgrade to Joomla 3.6.4 with the JSONvalidity. I check the metadata items erasing or replacing with the correct form, I check items one by one (around 35 items) the params content with a JSON Validator and all its OK and still with the same issue. Front end items works very good. Can some one help me?
http://imgur.com/a/Gnq24
http://imgur.com/a/Jp5xi
