Unable to apply firewall configuration error message displayed:
Another administrator is activating a configuration now.
Configuring and activating this firewall in Plesk takes a very long time
Attempt to apply configuration failed and further updates are locked.
Make sure that other admin users are not trying to change firewall settings.
/usr/local/psa/var/modules/firewall/safeact.confirmfile exists, if yes:
a. Stop Plesk engine:
# service sw-cp-server stop
b. Remove lock:
`# rm -i /usr/local/psa/var/modules/firewall/safeact.confirm
c. Start Plesk:
# service sw-cp-server start
Try to configure firewall again.