I was using an older version of matomo which was called piwik and after update, the UI gives me the below error.
# A fatal error occurred Please contact the system administrator, or [login to Matomo](http://rndwww.nce.amadeus.net/piwik/index.php?module=LoginLdap) to learn more. If you are Super User, but cannot login because of this error, you can still troubleshoot further. Follow these steps: 1) open the config/config.ini.php file and look for the `salt` value under `[General]` . 2) edit this current URL you are viewing and add the following text (replacing `salt_value_from_config` by the `salt` value from the config file): `index.php?i_am_super_user=salt_value_from_config&....`
Also i see this in my error logs,
PHP Fatal error: Class 'Piwik\\Plugin\\Settings' not found in /data/piwik/plugins/AnonymousPiwikUsageMeasurement/Settings.php on line 22
Could you tell me how to fix this and any related doc you have that i can follow to fix the issue?
Please help asap.
Thanks in advance.