I’ve run the upgrade from 2.0.2 to 2.0.3 on three installations of Piwik. I have found that if the DoNotTrack core plugin is not disabled prior to running the upgrade then this error is displayed:
“Warning: The following plugins are not compatible with Piwik 2.0.3 and could not be loaded: DoNotTrack. You can update or uninstall these plugins on the Manage Plugins page.”
On visiting the Manage Plugins page DoNotTrack is no longer listed and it is impossible to uninstall it and remove the error message.
If the plugin is de-activated prior to the upgrade all is well, although it will be necessary to visit the Privacy settings and re-activate this feature from there.
Question is: How can I resolve the error message?