Not work on joomla 3.6.4

hello,
I installed the version 3.6.4 and now does not work. I get an error of 0, you can not decrypt json

Hi, welcome on our forum where users try to help other users. Please help others too.
e.g. by describing more clearly what you've done.
(There are solved posts with the Json theme)
Are you on a fresh clean joomla 3.6.4 and only JEM 2.2.0 installed?
Or did you make an update from earlier JEM versions? ....

Hello Jojo.
thank you for your help. I'm update joomla from 3.6.2 and i uninstall en intall JEM, but the problem not solved. the only way it will work is replace the library by an old jsom (3.6.2)

I hope you made a backup. And perhaps an export of event, categories and more.
Before you uninstall, best is to choose in the settings global parameter: delete db when uninstalling=yes.
or you have to delete all db files of jem before installing new.

am wondering what's keeping the devs from responding but if i'm right we had a topic in this forum about JSON error. The thing is that something in the core of Joomla was changed and it's now trowing errors when something is not right with the data retrieved by JSON.

see topic: www.joomlaeventmanager.net/forum/jem-2-2-x-on-joomla-3/9962-solved-json-data-error-archived-events?limitstart=0

in this case it was due to the way the params were stored in the tables (event) and the fields metadata and attribs

question: was it a clean install of JEM + Joomla 3.6.4 ?

something you can try out is the following:
- at this link you can find a script that will check your tables for problems
github.com/robwent/joomla-json-db-check