Plesk shows the error: Failed opening required 'modules/firewall/FwConfigurator.

[mahesh]

Symptoms
After logging in to Plesk or switching between "Power user" and "Service Provider" views, the following error message appears in a web-browser:

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ERROR: require_once(): Failed opening required 'modules/firewall/FwConfigurator.php' (include_path=<...>
Cause
Plesk Firewall installation is corrupted.

Resolution
Reinstall Plesk Firewall:

1.Connect to the Plesk server via SSH.

2.Remove Plesk Firewall:

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#plesk installer remove --components psa-firewall
3.Install Plesk Firewall back:

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#plesk installer add --components psa-firewall