Presence builder is not accessible after Plesk upgrade from Plesk 12.5.30 to Plesk 17.5.3. The following error is shown in Plesk UI:
CONFIG_TEXT: ERROR: require_once(): Failed opening required 'constants.php3'
The command below shows the following:
# plesk installer --select-release-current --show-components | grep sitebuilder
sitebuilder [install] - Web Presence Builder
Web Presence Builder was not installed on the server.
Access the server via SSH. Install Web Presence Builder:
# plesk installer add --components sitebuilder