/var/www/html/app_mailerlite_com/releases/20190226123712/assets/plugins/groot/node_scripts/production.js:42
        throw new Error('Data must be a valid JSON');
        ^

Error: Data must be a valid JSON
    at Object.<anonymous> (/var/www/html/app_mailerlite_com/releases/20190226123712/assets/plugins/groot/node_scripts/production.js:42:15)
    at Module._compile (module.js:577:32)
    at Object.Module._extensions..js (module.js:586:10)
    at Module.load (module.js:494:32)
    at tryModuleLoad (module.js:453:12)
    at Function.Module._load (module.js:445:3)
    at Module.runMain (module.js:611:10)
    at run (bootstrap_node.js:394:7)
    at startup (bootstrap_node.js:160:9)
    at bootstrap_node.js:507:3