cd /opt/psa/admin/plib/modules
rm -r -f panel-news
Enter again in Extensions in Plesk
Remove the extension
Enter again in Extension in Plesk
Install again the extension
Uninstall the extension
Igor, I just had Juggernaut installed and was getting a conflict with the traffic monitor extension. Your instructions were the only way I could remove it and then get full functionality to my panel. thank you!