Checks Joomla 'params' and 'rules' fields in your Joomla database for invalid JSON data.
This plugin is based on the excellent work of Robert Went: https://github.com/robwent/joomla-json-db-check
Joomla 3.6.3 improved validation of JSON data stored in the database (Usually as params for extensions). Unfortunately, this means that after updating, sites with invalid data can can become inaccessible.
The usual error message shown is:
0 - Error decoding JSON data: Syntax error
Simply install the plugin with the Joomla extension installer. Use the Install from URL option.
Then use this URL: https://github.com/renekreijveld/JoomlaJsonCheck/files/555906/JoomlaJSonCheckPlugin.zip
After installation this plugin automatically checks Joomla 'params' and 'rules' fields in your Joomla database for invalid JSON data and repairs it. It then automatically uninstalls itself.