[Snapshot Pro] Snapshot triggering fatal error

Plugin could not be activated because it triggered a fatal error.

Warning: require_once(assets/shared-ui/plugin-ui.php): failed to open stream: No such file or directory in /home/mamn/public_html/wp-content/plugins/snapshot/snapshot.php on line 54

Fatal error: require_once(): Failed opening required 'assets/shared-ui/plugin-ui.php' (include_path='.:disappointed:opt/cpanel/ea-php71/root/usr/share/pear':wink: in /home/mamn/public_html/wp-content/plugins/snapshot/snapshot.php on line 54