Joomla problem after upgrading to 3.6.3 – Error decoding JSON data: object property name separator ‘:’ expected the bad data is: {“”}
After upgrading to Joomla 3.6.3 I got this error message when trying to login to administrator:
Error decoding JSON data: object property name separator ':' expected the bad data is: {""}
Solution was found here using the method suggested by Brent Laminack.
You need to issue the following SQL command using for example phpmyadmin:
update TABLEPREFIX_modules set params = '' where params like '%{""}%';
Note that you must replace TABLEPREFIX above with the prefix your Joomla installation is using.